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1. Direct evidence for charge stripes in a layered cobalt oxide

Author

P. Babkevich, P. G. Freeman, M. Enderle, D. Prabhakaran, and A. T. Boothroyd

Subjects
Science
Abstract

The nature of the magnetic ground state giving rise to the hourglass-shaped magnetic spectrum common among high-Tc superconductors is a matter of debate. Here, Babkevich et al. detect the presence of stripe charge order accompanied by quasi-one-dimensional antiferromagnetic order in La5/3Sr1/3CoO4, providing a natural explanation for this characteristic spectrum.

Published
2016
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2. Spin wave spectra of single crystal CoPS$_3$

Author

A. R. Wildes, B. Fåk, U. B. Hansen, M. Enderle, J. R. Stewart, L. Testa, H. M. Rønnow, C. Kim, and Je-Geun Park

Subjects
bilbao crystallographic server, Condensed Matter - Materials Science, spectroscopy, Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences, impurities, visualization, cd2p2s6
Abstract

The spin waves in single crystals of the layered van der Waals antiferromagnet CoPS$_3$ have been measured using inelastic neutron scattering. The data show four distinct spin wave branches with large ($\gtrsim 14$ meV) energy gaps at the Brillouin zone center indicating significant anisotropy. The data were modelled using linear spin wave theory derived from a Heisenberg Hamiltonian. Exchange interactions up to the third nearest-neighbour in the layered planes were required to fit the data with ferromagnetic $J_1 = -1.37$ meV between first neighbours, antiferromagnetic $J_3 = 3.0$ meV between third neighbours, and a very small $J_2 = 0.09$ meV between second neighbours. A biaxial single-ion anisotropy was required, with a collinear term $D^x = -0.77$ meV for the axis parallel to the aligned moment direction and a coplanar term $D^z=6.07$ meV for an axis approximately normal to the layered crystal planes., Comment: 11 pages, 6 figures, 3 tables

Published
2022
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4. Experimental determination of the magnetic interactions of frustrated Cairo pentagon lattice materials

Author

Myeong Jun Oh, Uwe Stuhr, Dmitry Batuk, Manh Duc Le, Seongsu Lee, Koichi Kindo, K. Ramesh Kumar, M. Enderle, Artem M. Abakumov, Akihiro Kondo, Jaehong Jeong, Younjung Jo, Je-Geun Park, Changhee Lee, Elisa M. Wheeler, B. Fåk, and Alexander A. Tsirlin

Subjects
Physics, Strongly Correlated Electrons (cond-mat.str-el), Spins, Condensed matter physics, Lattice (group), FOS: Physical sciences, 02 engineering and technology, 021001 nanoscience & nanotechnology, Coupling (probability), 01 natural sciences, Inelastic neutron scattering, Magnetization, Condensed Matter - Strongly Correlated Electrons, Spin wave, 0103 physical sciences, Antiferromagnetism, Condensed Matter::Strongly Correlated Electrons, 010306 general physics, 0210 nano-technology, Spin-½
Abstract

We present inelastic neutron scattering measurements of the Cairo pentagon lattice magnets Bi$_2$Fe$_4$O$_9$ and Bi$_4$Fe$_5$O$_{13}$F, supported by high field magnetisation measurements of Bi$_2$Fe$_4$O$_9$. Using linear spin wave theory and mean field analyses we determine the spin exchange interactions and single-ion anisotropy in these materials. The Cairo lattice is geometrically frustrated and consists of two inequivalent magnetic sites, both occupied by Fe$^{3+}$ ions and connected by two competing nearest neighbour interactions. We found that one of these interactions, coupling nearest neighbour spins on the three-fold symmetric sites, is extremely strong and antiferromagnetic. These strongly coupled dimers are then weakly coupled to a framework formed from spins occupying the other inequivalent site. In addition we found that the Fe$^{3+}$ $S=5/2$ spins have a non-negligible single-ion anisotropy, which manifests as a spin anisotropy gap in the neutron spectrum and a spin-flop transition in high field magnetisation measurements., 10 pages, 9 figures

Published
2021

5. Quantifying and Controlling Entanglement in the Quantum Magnet Cs 2

Author

Pontus Laurell, Zbigniew Tylczyński, Gonzalo Alvarez, Allen Scheie, D. Alan Tennant, Satoshi Okamoto, M. Enderle, Chiron J. Mukherjee, Michael Marek Koza, and Radu Coldea

Subjects
Physics, General Physics and Astronomy, Quantum Physics, Quantum entanglement, Renormalization group, 01 natural sciences, Inelastic neutron scattering, 010305 fluids & plasmas, Magnetic field, Quantum state, Quantum mechanics, Magnet, 0103 physical sciences, 010306 general physics, Realization (systems), Quantum
Abstract

The lack of methods to experimentally detect and quantify entanglement in quantum matter impedes our ability to identify materials hosting highly entangled phases, such as quantum spin liquids. We thus investigate the feasibility of using inelastic neutron scattering (INS) to implement a model-independent measurement protocol for entanglement based on three entanglement witnesses: one-tangle, two-tangle, and quantum Fisher information (QFI). We perform high-resolution INS measurements on ${\mathrm{Cs}}_{2}{\mathrm{CoCl}}_{4}$, a close realization of the $S=1/2$ transverse-field $XXZ$ spin chain, where we can control entanglement using the magnetic field, and compare with density-matrix renormalization group calculations for validation. The three witnesses allow us to infer entanglement properties and make deductions about the quantum state in the material. We find QFI to be a particularly robust experimental probe of entanglement, whereas the one and two-tangles require more careful analysis. Our results lay the foundation for a general entanglement detection protocol for quantum spin systems.

Published
2021
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6. EUS-ablation with hybridtherm probe plus chemotherapy versus chemotherapy alone in locally advanced/borderline resectable pancreatic cancer: A phase II randomized controlled trial

Author

S.G.G. Testoni, M.C. Petrone, M. Reni, G. Rossi, M. Barbera, S. Gusmini, G. Balzano, W. Linzenbold, M. Enderle, E. Dellatorre, F. De Cobelli, C. Doglioni, M. Falconi, G. Capurso, and P.G. Arcidiacono

Subjects
Hepatology, Endocrinology, Diabetes and Metabolism, Gastroenterology
Published
2021
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8. Observation of Magnon Polarization

Author

Masaki Fujita, Barry Winn, Yusuke Nambu, Eiji Saitoh, Kazuhisa Kakurai, Joseph Barker, John M. Tranquada, Takashi Kikkawa, M. Enderle, Tobias Weber, Timothy Ziman, Melissa Graves-Brook, Y. Okino, Gerrit E. W. Bauer, Yuki Shiomi, and Theory of Condensed Matter

Subjects
Physics, Spintronics, Condensed matter physics, Condensed Matter::Other, Magnon, General Physics and Astronomy, Neutron scattering, Polarization (waves), 01 natural sciences, Spectral line, Condensed Matter::Materials Science, Ferrimagnetism, Magnet, 0103 physical sciences, Thermoelectric effect, Condensed Matter::Strongly Correlated Electrons, 010306 general physics
Abstract

We measure the mode-resolved direction of the precessional motion of the magnetic order, i.e., magnon polarization, via the chiral term of inelastic polarized neutron scattering spectra. The magnon polarization is a unique and unambiguous signature of magnets and is important in spintronics, affecting thermodynamic properties such as the magnitude and sign of the spin Seebeck effect. However, it has never been directly measured in any material until this work. The observation of both signs of magnon polarization in Y_{3}Fe_{5}O_{12} also gives direct proof of its ferrimagnetic nature. The experiments agree very well with atomistic simulations of the scattering cross section.

Published
2020

9. Neutron polarisation correction to triple-axis data with analytical derivations

Author

Y Nambu, M Enderle, T. Weber, and K Kakurai

Subjects
History, Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science, Strongly Correlated Electrons (cond-mat.str-el), Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences, Computer Science Applications, Education
Abstract

Polarised neutron scattering is the method of choice to study magnetism in condensed matter. Polarised neutrons are typically very low in flux, and complex experimental configurations further reduce the count rate. Neutron polarisation corrections would therefore be needed. Here we analytically derive formulae of the corrected partial differential scattering cross-sections. The analytical method is designed for the longitudinal polarisation analysis, and the correction generally holds for time-independent polarised neutrons with a triple-axis spectrometer. We then apply the correction to recent results of our $P_x$ experiment on Y$_3$Fe$_5$O$_{12}$. Although there is a difficulty with the experimental determination of inefficiency parameters of neutron spin polarisers and flippers, the correction appears to work properly., 8 pages, 2 figures

Published
2020

13. Plaquette instability competing with bicollinear ground state in detwinned FeTe

Author

Douglas L. Abernathy, Jin Hu, David W. Tam, Jennifer L. Niedziela, Helen Walker, Zhiqiang Mao, M. Enderle, Qimiao Si, Xingye Lu, Yixi Su, Hsin-Hua Lai, Pengcheng Dai, and Tobias Weber

Subjects
Rotational symmetry, FOS: Physical sciences, 02 engineering and technology, 01 natural sciences, Inelastic neutron scattering, Superconductivity (cond-mat.supr-con), symbols.namesake, Condensed Matter - Strongly Correlated Electrons, Spin wave, Condensed Matter::Superconductivity, 0103 physical sciences, Antiferromagnetism, ddc:530, 010306 general physics, Superconductivity, Physics, Condensed matter physics, Strongly Correlated Electrons (cond-mat.str-el), Scattering, Condensed Matter - Superconductivity, 021001 nanoscience & nanotechnology, symbols, Condensed Matter::Strongly Correlated Electrons, 0210 nano-technology, Ground state, Hamiltonian (quantum mechanics)
Abstract

We use inelastic neutron scattering to show that long-range spin waves arising from the static bicollinear antiferromagnetic (AF) order in FeTe, which have twofold rotational symmetry in a fully detwinned crystal, rapidly dissolve above $E\approx 26$ meV into ridges of scattering with fourfold rotational symmetry and a nearly isotropic magnetic fluctuation spectrum. With increasing temperature above $T_N\approx 68$ K, the twofold spin waves change into broad regions of scattering with fourfold symmetry. Since the scattering patterns from plaquette magnetic order generated within a bilinear biquadratic Hamiltonian have fourfold rotational symmetry consistent with the high-energy, spin-isotropic spin waves of FeTe, we conclude that the bicollinear AF state in FeTe is quasidegenerate with plaquette magnetic order, providing evidence for the strongly frustrated nature of the local moments in iron chalcogenide family of iron-based superconductors., Comment: 12 pages, 11 figures

Published
2019
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14. Spin dynamics and exchange interactions in CuO measured by neutron scattering

Author

S. M. Gaw, Russell A. Ewings, Sándor Tóth, D. Prabhakaran, E. Hamilton, Henrik Jacobsen, E. M. Hétroy Wheeler, A. J. Princep, M. Enderle, and Andrew T. Boothroyd

Subjects
Physics, Condensed matter physics, Strongly Correlated Electrons (cond-mat.str-el), Magnetism, FOS: Physical sciences, 02 engineering and technology, Neutron scattering, Inelastic scattering, 021001 nanoscience & nanotechnology, 01 natural sciences, Ferroelectricity, Brillouin zone, Condensed Matter - Strongly Correlated Electrons, 0103 physical sciences, Antiferromagnetism, Neutron, Multiferroics, Condensed Matter::Strongly Correlated Electrons, 010306 general physics, 0210 nano-technology
Abstract

The magnetic properties of CuO encompass several contemporary themes in condensed-matter physics, including quantum magnetism, magnetic frustration, magnetically-induced ferroelectricity, and orbital currents. Here we report polarized and unpolarized neutron inelastic scattering measurements which provide a comprehensive map of the cooperative spin dynamics in the low-temperature antiferromagnetic (AFM) phase of CuO throughout much of the Brillouin zone. At high energies ($E\ensuremath{\gtrsim}100\phantom{\rule{0.28em}{0ex}}\mathrm{meV}$), the spectrum displays continuum features consistent with the des Cloizeax--Pearson dispersion for an ideal $S=\frac{1}{2}$ Heisenberg AFM chain. At lower energies, the spectrum becomes more three dimensional, and we find that a linear spin-wave model for a Heisenberg AFM provides a very good description of the data, allowing for an accurate determination of the relevant exchange constants in an effective spin Hamiltonian for CuO. In the high-temperature helicoidal phase, there are features in the measured low-energy spectrum that we could not reproduce with a spin-only model. We discuss how these might be associated with the magnetically-induced multiferroic behavior observed in this phase.

Published
2018
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15. Magnetic excitations from the two-dimensional interpenetrating Cu framework in Ba2Cu3O4Cl2

Author

D. Lançon, Helen Walker, N. E. Shaik, M. Enderle, Pascal Manuel, Yasujiro Taguchi, T. Masuda, A. Kikkawa, Dmitry D. Khalyavin, P. Babkevich, Russell A. Ewings, Y. Tokura, D. T. Adroja, Henrik M. Rønnow, and Minoru Soda

Subjects
Physics, Quantitative Biology::Neurons and Cognition, Hubbard model, Condensed matter physics, Spectrum (functional analysis), 02 engineering and technology, Neutron scattering, 021001 nanoscience & nanotechnology, 01 natural sciences, Magnetic field, 0103 physical sciences, Dispersion (optics), Antiferromagnetism, Condensed Matter::Strongly Correlated Electrons, Neutron, 010306 general physics, 0210 nano-technology, Order of magnitude
Abstract

We report detailed neutron scattering studies on Ba2Cu3O4Cl2. The compound consists of two interpenetrating sublattices of Cu, labeled as Cu-A and Cu-B, each of which forms a square-lattice Heisenberg antiferromagnet. The two sublattices order at different temperatures and effective exchange couplings within the sublattices differ by an order of magnitude. This yields an inelastic neutron spectrum of the Cu-A sublattice extending up to 300 meV and a much weaker dispersion of Cu-B going up to around 20 meV. Using a single-band Hubbard model we derive an effective spin Hamiltonian. From this, we find that linear spin-wave theory gives a good description to the magnetic spectrum. In addition, a magnetic field of 10 T is found to produce effects on the Cu-B dispersion that cannot be explained by conventional spin-wave theory.

Published
2017
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16. Magnetic structure of the noncentrosymmetric heavy-fermion superconductor CePt3Si

Author

G. Lapertot, M. Enderle, and B. Fåk

Subjects
Physics, History, Condensed matter physics, Magnetic structure, Strongly Correlated Electrons (cond-mat.str-el), FOS: Physical sciences, 02 engineering and technology, Heavy fermion superconductor, 021001 nanoscience & nanotechnology, 01 natural sciences, Computer Science Applications, Education, Condensed Matter - Strongly Correlated Electrons, Condensed Matter::Superconductivity, 0103 physical sciences, 010306 general physics, 0210 nano-technology
Abstract

We have determined the magnetic structure of the noncentrosymmetric heavy-fermion superconductor CePt3Si using elastic polarized neutron scattering with field-projected (longitudinal) XYZ polarization analysis. We find that the magnetic moment has components both in the tetragonal basal plane and along the tetragonal four-fold axis. Such a magnetic structure is not symmetry-allowed if the magnetic phase transition is second order, and may imply that CePt3Si has lower symmetry in the superconducting state than originally thought., 4 pages, 0 figures

Published
2016

18. CO2-Einsatz bei jedem Patienten?

Author

M Bretthauer, M Kalager, K Kandiah, Axel Eickhoff, Karl-Hermann Fuchs, A Schmidt, R M Yunus, K Murakami, H Minami, B Memon, Hans-Olov Adami, T. Suzuki, K Caca, T Komatsu, H Kataoka, S Subramaniam, Jürgen Hochberger, Ulrike Beilenhoff, M A Memon, J Hayano, Pradeep Bhandari, Edris Wedi, Ulrike W. Denzer, L Altenhofen, and M Enderle

Subjects
03 medical and health sciences, 0302 clinical medicine, 030211 gastroenterology & hepatology, 030212 general & internal medicine
Published
2017
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19. Quantum Criticality and Scaling of the Magnetic Response in CeCu6−x Aux

Author

W. Schmidt, M. Loewenhaupt, Hilbert von Löhneysen, M. Enderle, and Oliver Stockert

Subjects
Quantum phase transition, Physics, Condensed matter physics, General Materials Science, Condensed Matter Physics, Magnetic quantum number, Scaling, Spin quantum number, Atomic and Molecular Physics, and Optics, Inelastic neutron scattering, Spin-½, Spin magnetic moment, Magnetic field
Abstract

The heavy-fermion system CeCu6−x Au x which exhibits antiferromagnetic order for Au concentrations x>0.1, can be easily tuned to a quantum phase transition, either by chemical composition, i.e., Au concentration, or by an external magnetic field. We present extensive inelastic neutron scattering measurements in order to study the momentum and energy dependence of the critical spin fluctuations for concentration- and magnetic field-tuned CeCu6−x Au x . The quasi-2D fluctuations, observed for x=0.1 at the magnetic instability, are already present in pure CeCu6 and persist to x=0.2, i.e., well into the magnetically ordered regime. This is a strong hint that disorder does not play a major role in this system. The magnetic response for quantum critical CeCu6−x Au x exhibits critical slowing down and obeys scaling relations that depend on the tuning parameter. While the E/T scaling of the dynamic susceptibility in concentration-tuned CeCu5.9Au0.1 is an indication for local quantum criticality, the E/T 3/2 scaling in field-tuned CeCu5.8Au0.2 points to a conventional spin-density-wave instability.

Published
2010
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20. Design Study of High Field Resistive Magnets for Diffraction Experiments

Author

F Wilhelm, Jean Dumas, Nadine Vidal, François Debray, Rolf Pfister, S Labbe-Lavigne, M Enderle, and Christophe Trophime

Subjects
Physics, Diffraction, business.industry, Scattering, Synchrotron radiation, Superconducting magnet, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Magnetic field, Split magnet, Optics, Magnet, Neutron, Electrical and Electronic Engineering, business
Abstract

The European Synchrotron Radiation Facility (ESRF), and the Institut Laue Langevin neutron facility (ILL) in collaboration with the Laboratoire National des Champs Magne?tiques Intenses (LNCMI-CNRS) have performed during 2008 a design study for the implementation of continuous high magnetic fields suitable for diffraction studies. Two main designs have been studied: a horizontal field magnet suitable for back scattering and absorption experiments and a split magnet.

Published
2010
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21. Endoskopische Submukosa-Dissektion – technische Voraussetzungen

Author

Peter Köhler, D. Menke, S. Dammer, Jürgen Hochberger, J. Raiser, M. Enderle, and Eberhard Kruse

Subjects
Gastroenterology
Abstract

Die endoskopische Submukosa-Dissektion (ESD) hat sich in den vergangenen Jahren in Europa an ersten Zentren als klinisch junges Verfahren etablieren konnen. Systematische Untersuchungen zu den notwendigen technischen Voraussetzungen, Ausstattungen oder Vorgehensweisen fehlen bisher jedoch im Wesentlichen. Im Folgenden soll auf einzelne verfugbare Daten aus der Literatur sowie eigene praktische Erfahrungen eingegangen werden.

Published
2009
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22. Anisotropic magnetic fluctuations in 3- antiferromagnets

Author

M. Enderle, Stefano Carretta, Roberto Caciuffo, G. H. Lander, Elizabeth Blackburn, Giuseppe Amoretti, P. J. Brown, Nicola Magnani, and Paolo Santini

Subjects
Physics, Magnetic anisotropy, Magnetic structure, Condensed matter physics, Spin wave, Inelastic scattering, Condensed Matter Physics, Polarization (waves), Anisotropy, Random phase approximation, Inelastic neutron scattering, Electronic, Optical and Magnetic Materials
Abstract

The anisotropy of magnetic fluctuations propagating along the high-symmetry directions in cubic systems with 3- k magnetic order is analyzed within the random-phase approximation assuming anisotropic exchange interactions. Both transverse and longitudinal structures are considered, with reference to the UO 2 and USb compounds, respectively. In the case of UO 2 , the spin-waves polarizations calculated for acoustic and optical branches are favorably compared with three-dimensional polarization analysis experiments carried out on a triple axis spectrometer. The overall spin-waves polarization behavior emerges as a consequence of the 3- k nature of the magnetic order, whatever the strength of the exchange coupling assumed.

Published
2007
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23. Magnetic fluctuations at the field-tuned vs. concentration-tuned quantum phase transition in

Author

Hilbert von Löhneysen, Oliver Stockert, and M. Enderle

Subjects
Quantum phase transition, Physics, Curie–Weiss law, Condensed matter physics, Quantum critical point, Antiferromagnetism, Condensed Matter::Strongly Correlated Electrons, Condensed Matter Physics, Néel temperature, Critical field, Inelastic neutron scattering, Quantum fluctuation, Electronic, Optical and Magnetic Materials
Abstract

CeCu 6 - x Au x has become a model system to study magnetic quantum phase transitions (QPT). In this system, the QPT can be tuned by Au concentration x , pressure, or magnetic field. Previous inelastic neutron-scattering (INS) experiments have demonstrated an anomalous scaling of the dynamical susceptibility at the concentration-tuned (zero-field) QPT for x = 0.1 , i.e., χ - 1 ( q , E , T ) = c - 1 [ θ α ( q ) + ( T - i E ) α ] , where θ ( q ) is a generalized Curie–Weiss temperature. This scaling suggests local criticality, with an anomalous exponent α ≈ 0.75 . Here we report on an INS study at the field-induced magnetic QPT of CeCu 5.8 Au 0.2 where the Neel temperature is driven to zero at a critical field of B ≈ 0.4 T , supplemented by specific-heat data. The INS data can be described better by the spin-density-wave scenario, i.e., χ - 1 ( Q AF , E , T ) = a - 1 ( T 3 / 2 - i bE ) where Q AF is the antiferromagnetic ordering wave vector, than by a local quantum critical point. This constitutes direct microscopic evidence for a difference in quantum fluctuation spectra at a magnetic QPT driven by different tuning parameters.

Published
2007
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24. Simvastatin versus Colestipol: Mono- or Combination Therapy

Author

M. Eggstein, A. Schmeisser, R.-M. Schmülling, M. Pfohl, G. Schnauder, M. Enderle, and S. Schröder

Subjects
medicine.medical_specialty, Combination therapy, business.industry, Simvastatin, Internal medicine, Colestipol, medicine, Cardiology, Urology, business, medicine.drug
Published
2015
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26. Jahn-Teller versus quantum effects in the spin-orbital material LuVO3

Author

Denis Sheptyakov, B. Roessli, L. D. Tung, Sándor Tóth, A. Stunault, M. Enderle, Garry J. McIntyre, Antonio Cervellino, D. I. Khomskii, M. Skoulatos, Manfred Reehuis, Ch. Rüegg, C. Marjerrison, J. P. Goff, P.J. Brown, Alan I. Goldman, Paul Gregory Freeman, Andreas Kreyssig, Ekaterina Pomjakushina, and Klaus Habicht

Subjects
Physics, Jahn Teller effect, LuVO3, spin orbit interaction, Magnetic structure, Strongly Correlated Electrons (cond-mat.str-el), Jahn–Teller effect, FOS: Physical sciences, Condensed Matter Physics, Magnetic quantum number, Electronic, Optical and Magnetic Materials, Condensed Matter - Strongly Correlated Electrons, Atomic orbital, Quantum mechanics, Neutron, Ground state, Quantum, Spin-½
Abstract

We report on combined neutron and resonant x-ray scattering results, identifying the nature of the spin-orbital ground state and magnetic excitations in LuVO3 as driven by the orbital parameter. In particular, we distinguish between models based on orbital Peierls dimerization, taken as a signature of quantum effects in orbitals, and Jahn-Teller distortions, in favor of the latter. In order to solve this long-standing puzzle, polarized neutron beams were employed as a prerequisite in order to solve details of the magnetic structure, which allowed quantitative intensity-analysis of extended magnetic excitation data sets. The results of this detailed study enabled us to draw definite conclusions about classical vs quantum behavior of orbitals in this system and to discard the previous claims about quantum effects dominating the orbital physics of LuVO3 and similar systems., Comment: Phys. Rev. B 91, 161104(R) (2015)

Published
2015
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27. Intense Cholesterol Lowering Therapy with a HMG-CoA Reductase Inhibitor does not Improve Nitric Oxide Dependent Endothelial Function in Type-2-Diabetes

Author

Kilian Rittig, HU Häring, Bernd Balletshofer, A. Ferenc Pap, S. Matthaei, T. C. Wascher, T. Westermeier, M. Enderle, S. Goebbel, I. Schmölzer, and D. Petzinna

Subjects
medicine.medical_specialty, Statin, Endothelium, medicine.diagnostic_test, business.industry, medicine.drug_class, Endocrinology, Diabetes and Metabolism, Cerivastatin, General Medicine, Type 2 diabetes, medicine.disease, Placebo, Hydroxymethylglutaryl-CoA reductase, Gastroenterology, Endocrinology, medicine.anatomical_structure, Internal medicine, Internal Medicine, medicine, Endothelial dysfunction, business, Lipid profile, medicine.drug
Abstract

Disturbances in nitric oxide (NO) metabolism resulting in endothelial dysfunction play a central role in the pathogenesis of atherosclerosis in hypercholesterolemia and in individuals with type 2 diabetes. It is unclear whether lipid lowering therapy with HMG-CoA-reductase inhibitors might improve endothelial function in subjects with type 2 diabetes as it is demonstrated in non-diabetic subjects with hypercholesterolemia. We examined the influence of 0.2 mg and 0.8 mg cerivastatin on endothelial function in a multicenter, randomised, double-blind, and three-arm placebo-controlled clinical trial. Endothelial function was assessed by nitric oxide-dependent flow mediated vasodilatation (FMD) of the brachial artery. A total of 103 patients with type 2 diabetes were enrolled in the study. Bayer Company undertook a voluntary action to withdraw cerivastatin from market, therefore the study was terminated earlier. At this point 77 patients were randomised, of which 58 completed the study (mean age 60 +/- 8 years, HbA1c 7.4 +/- 0.9 %). At baseline mean FMD was disturbed in all three therapy arms (5.18 +/- 2.31 % in the placebo group, 3.88 +/- 1.68 in the 0.2-mg cerivastation group, and 4.86 +/- 2.25 in the 0.8-mg cerivastatin group). Despite a significant reduction in cholesterol and LDL-cholesterol-levels after 12 weeks of treatment (decrease in LDL-cholesterol - 26.8 +/- 13.9 % in the 0.2-mg group and - 40.3 +/- 16.0 % in the 0.8-mg group, p = 0.0001, ANCOVA) there was no difference in flow mediated vasodilatation (p = 0.52 and p = 0.56 vs. placebo, respectively, ANCOVA). HbA1c, CRP, and HDL-cholesterol did not change during the study. Furthermore no difference in safety profile between cerivastatin and placebo was found. Despite a significant improvement in lipid profile under statin therapy, no improvement of endothelial dysfunction in terms of nitric oxide bioavailability could be detected.

Published
2005
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28. Hidden order in

Author

Luigi Paolasini, M. E. Zhitomirsky, Vladimir P. Mineev, M. Enderle, B. Fåk, N. Kernavanois, A. Bombardi, Jacques Flouquet, Pascal Lejay, P. Burlet, and Frederic Bourdarot

Subjects
Superconductivity, Physics, Phase transition, Dipole, Thermal conductivity, Magnetic structure, Condensed matter physics, Hydrostatic pressure, Antiferromagnetism, Electrical and Electronic Engineering, Anomaly (physics), Condensed Matter Physics, Electronic, Optical and Magnetic Materials
Abstract

Neutron-scattering and specific-heat measurements of the heavy-fermion superconductor URu 2 Si 2 under hydrostatic pressure and with Rh-doping, U ( Ru 0.98 Rh 0.02 ) 2 Si 2 , show the existence of two magnetic phase transitions. At T m ∼ 17.5 K , a second-order phase transition with strong anomalies in the specific heat and other macroscopic and transport properties are accompanied by an antiferromagnetically ordered dipolar moment of only 0.03 μ B . At T M T m under pressure, p ⩾ 5 kbar , or small Rh doping, a first-order phase transition gives rise to small anomalies in the specific heat and a large ordered moment of ∼ 0.3 μ B , but with the same magnetic structure. The results can be understood in terms of a hidden order parameter ψ , which is linearly coupled to the ordered moment m. It follows that m and ψ have the same symmetry and hence both break time-reversal symmetry.

Published
2005
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29. Macroscopic quantum entanglement of oxygen molecules confined into nanopores

Author

R. Ackermann and M. Enderle

Subjects
Magnetization, Phase transition, Materials science, Spins, Condensed matter physics, Heisenberg model, Phase (matter), General Physics and Astronomy, Antiferromagnetism, Condensed Matter::Strongly Correlated Electrons, Quantum entanglement, Magnetic susceptibility
Abstract

Solid molecular oxygen is a rare example of pure direct-exchange interaction between localized electronic spins S = 1. Antiferromagnetic correlations between nearest O2 neighbors exist already in the liquid phase. When solidified, O2 undergoes two magneto-structural phase transitions. The low-temperature phase is long-range ordered with collinear antiferromagnetic alignment of the O2 spins. We performed DC susceptibility measurements of O2 confined into the nanometer-sized pores of silica substrates. At the smallest pore diameters, all solid-solid phase transitions are suppressed. By quantitative investigation of different degrees of filling, we obtain convincing evidence that the major part of the spins is entangled into a collective singlet ground state.

Published
2003
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30. Anisotropic neutron spin resonance in underdoped superconducting NaFe 1 − x Co x As

Author

M. Enderle, Guotai Tan, Zachary C. Sims, Takeshi Egami, Yu Song, Jiri Kulda, Pengcheng Dai, Chenglin Zhang, Yixi Su, Louis-Pierre Regnault, Qimiao Si, Rice University [Houston], Magnétisme et Diffusion Neutronique (MDN), Modélisation et Exploration des Matériaux (MEM), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Juelich Centre for Neutron Science, IFF, Forschungszentrum Juelich, Institut Laue-Langevin (ILL), The University of Tennessee [Knoxville], Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and ILL

Subjects
Physics, Superconductivity, Spin polarization, Condensed matter physics, Magnetism, Condensed Matter - Superconductivity, FOS: Physical sciences, Electron, Condensed Matter Physics, Inelastic neutron scattering, 3. Good health, Electronic, Optical and Magnetic Materials, Superconductivity (cond-mat.supr-con), Magnetic anisotropy, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Antiferromagnetism, Neutron, Condensed Matter::Strongly Correlated Electrons, [PHYS.COND.CM-SCE]Physics [physics]/Condensed Matter [cond-mat]/Strongly Correlated Electrons [cond-mat.str-el], ComputingMilieux_MISCELLANEOUS
Abstract

We use polarized inelastic neutron scattering (INS) to study spin excitations in superconducting NaFe0.985Co0.015As (C15) with static antiferromagnetic (AF) order along the a-axis of the orthorhombic structure and NaFe0.935Co0.045As (C45) without AF order. In previous unpolarized INS work, spin excitations in C15 were found to have a dispersive sharp resonance near Er1=3.25 meV and a broad dispersionless mode at Er2=6 meV. Our neutron polarization analysis reveals that the dispersive resonance in C15 is highly anisotropic and polarized along the a- and c-axis, while the dispersionless mode is isotropic similar to that of C45. Since the a-axis polarized spin excitations of the anisotropic resonance appear below Tc, our data suggests that the itinerant electrons contributing to the magnetism are also coupled to the superconductivity., Comment: PRB(R), 2014

Published
2014
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32. Search for invisible decays of Higgs bosons in the vector boson fusion and associated ZH production modes

Author

Chatrchyan, S. Khachatryan, V. Sirunyan, A.M. Tumasyan, A. Adam, W. Bergauer, T. Dragicevic, M. Erö, J. Fabjan, C. Friedl, M. Frühwirth, R. Ghete, V.M. Hartl, C. Hörmann, N. Hrubec, J. Jeitler, M. Kiesenhofer, W. Knünz, V. Krammer, M. Krätschmer, I. Liko, D. Mikulec, I. Rabady, D. Rahbaran, B. Rohringer, H. Schöfbeck, R. Strauss, J. Taurok, A. Treberer-Treberspurg, W. Waltenberger, W. Wulz, C.-E. Mossolov, V. Shumeiko, N. Suarez Gonzalez, J. Alderweireldt, S. Bansal, M. Bansal, S. Cornelis, T. De Wolf, E.A. Janssen, X. Knutsson, A. Luyckx, S. Ochesanu, S. Roland, B. Rougny, R. Van Haevermaet, H. Van Mechelen, P. Van Remortel, N. Van Spilbeeck, A. Blekman, F. Blyweert, S. D’Hondt, J. Heracleous, N. Kalogeropoulos, A. Keaveney, J. Kim, T.J. Lowette, S. Maes, M. Olbrechts, A. Python, Q. Strom, D. Tavernier, S. Van Doninck, W. Van Mulders, P. Van Onsem, G.P. Villella, I. Caillol, C. Clerbaux, B. De Lentdecker, G. Favart, L. Gay, A.P.R. Léonard, A. Marage, P.E. Mohammadi, A. Perniè, L. Reis, T. Seva, T. Thomas, L. Vander Velde, C. Vanlaer, P. Wang, J. Adler, V. Beernaert, K. Benucci, L. Cimmino, A. Costantini, S. Crucy, S. Dildick, S. Garcia, G. Klein, B. Lellouch, J. Mccartin, J. Ocampo Rios, A.A. Ryckbosch, D. Salva Diblen, S. Sigamani, M. Strobbe, N. Thyssen, F. Tytgat, M. Walsh, S. Yazgan, E. Zaganidis, N. Basegmez, S. Beluffi, C. Bruno, G. Castello, R. Caudron, A. Ceard, L. Da Silveira, G.G. Delaere, C. du Pree, T. Favart, D. Forthomme, L. Giammanco, A. Hollar, J. Jez, P. Komm, M. Lemaitre, V. Liao, J. Militaru, O. Nuttens, C. Pagano, D. Pin, A. Piotrzkowski, K. Popov, A. Quertenmont, L. Selvaggi, M. Vidal Marono, M. Vizan Garcia, J.M. Beliy, N. Caebergs, T. Daubie, E. Hammad, G.H. Alves, G.A. Correa Martins Junior, M. Martins, T. Pol, M.E. Aldá Júnior, W.L. Carvalho, W. Chinellato, J. Custódio, A. Da Costa, E.M. De Jesus Damiao, D. De Oliveira Martins, C. Fonseca De Souza, S. Malbouisson, H. Malek, M. Matos Figueiredo, D. Mundim, L. Nogima, H. 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Savin, A. Smith, W.H. Woods, N. The CMS Collaboration

Subjects
High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract

A search for invisible decays of Higgs bosons is performed using the vector boson fusion and associated ZH production modes. In the ZH mode, the Z boson is required to decay to a pair of charged leptons or a bb quark pair. The searches use the 8┬á TeV pp collision dataset collected by the CMS detector at the LHC, corresponding to an integrated luminosity of up to 19.7┬á fb-1. Certain channels include data from 7┬á TeV collisions corresponding to an integrated luminosity of 4.9┬á fb-1. The searches are sensitive to non-standard-model invisible decays of the recently observed Higgs boson, as well as additional Higgs bosons with similar production modes and large invisible branching fractions. In all channels, the observed data are consistent with the expected standard model backgrounds. Limits are set on the production cross section times invisible branching fraction, as a function of the Higgs boson mass, for the vector boson fusion and ZH production modes. By combining all channels, and assuming standard model Higgs boson cross sections and acceptances, the observed (expected) upper limit on the invisible branching fraction at mH = 125 ┬á GeV is found to be 0.58┬á(0.44) at 95┬á% confidence level. We interpret this limit in terms of a Higgs-portal model of dark matter interactions. © 2014, The Author(s).

Published
2014

33. Search for supersymmetry with razor variables in pp collisions at s =7TeV

Author

Chatrchyan, S. Khachatryan, V. Sirunyan, A.M. Tumasyan, A. Adam, W. Bergauer, T. Dragicevic, M. Erö, J. Fabjan, C. Friedl, M. Frühwirth, R. Ghete, V.M. Hartl, C. Hörmann, N. Hrubec, J. Jeitler, M. Kiesenhofer, W. Knünz, V. Krammer, M. Krätschmer, I. Liko, D. Mikulec, I. Rabady, D. Rahbaran, B. Rohringer, H. Schöfbeck, R. Strauss, J. Taurok, A. Treberer-Treberspurg, W. Waltenberger, W. Wulz, C.-E. Mossolov, V. Shumeiko, N. Suarez Gonzalez, J. Alderweireldt, S. Bansal, M. Bansal, S. Cornelis, T. De Wolf, E.A. Janssen, X. Knutsson, A. Luyckx, S. Ochesanu, S. Roland, B. Rougny, R. Van Haevermaet, H. Van Mechelen, P. Van Remortel, N. Van Spilbeeck, A. Blekman, F. Blyweert, S. D'Hondt, J. Heracleous, N. Kalogeropoulos, A. Keaveney, J. Kim, T.J. Lowette, S. Maes, M. Olbrechts, A. Python, Q. Strom, D. Tavernier, S. Van Doninck, W. Van Mulders, P. Van Onsem, G.P. Villella, I. Caillol, C. Clerbaux, B. De Lentdecker, G. Favart, L. Gay, A.P.R. Léonard, A. Marage, P.E. Mohammadi, A. Perniè, L. Reis, T. Seva, T. Thomas, L. Vander Velde, C. Vanlaer, P. Wang, J. Adler, V. Beernaert, K. Benucci, L. Cimmino, A. Costantini, S. Crucy, S. Dildick, S. Garcia, G. Klein, B. Lellouch, J. McCartin, J. Ocampo Rios, A.A. Ryckbosch, D. Salva Diblen, S. Sigamani, M. Strobbe, N. Thyssen, F. Tytgat, M. Walsh, S. Yazgan, E. Zaganidis, N. Basegmez, S. Beluffi, C. Bruno, G. Castello, R. Caudron, A. Ceard, L. Da Silveira, G.G. Delaere, C. Du Pree, T. Favart, D. Forthomme, L. Giammanco, A. Hollar, J. Jez, P. Komm, M. Lemaitre, V. Liao, J. Militaru, O. Nuttens, C. Pagano, D. Pin, A. Piotrzkowski, K. Popov, A. Quertenmont, L. Selvaggi, M. Vidal Marono, M. Vizan Garcia, J.M. Beliy, N. Caebergs, T. Daubie, E. Hammad, G.H. Alves, G.A. Correa Martins Junior, M. Dos Reis Martins, T. Pol, M.E. Aldá Júnior, W.L. Carvalho, W. Chinellato, J. Custódio, A. Da Costa, E.M. De Jesus Damiao, D. De Oliveira Martins, C. Fonseca De Souza, S. Malbouisson, H. Malek, M. Matos Figueiredo, D. Mundim, L. Nogima, H. Prado Da Silva, W.L. Santaolalla, J. Santoro, A. Sznajder, A. Tonelli Manganote, E.J. Vilela Pereira, A. Bernardes, C.A. Dias, F.A. Fernandez Perez Tomei, T.R. Gregores, E.M. Mercadante, P.G. Novaes, S.F. Padula, S.S. Genchev, V. Iaydjiev, P. Marinov, A. Piperov, S. Rodozov, M. Sultanov, G. Vutova, M. Dimitrov, A. Glushkov, I. Hadjiiska, R. Kozhuharov, V. Litov, L. Pavlov, B. Petkov, P. Bian, J.G. Chen, G.M. Chen, H.S. Chen, M. Du, R. Jiang, C.H. Liang, D. Liang, S. Meng, X. Plestina, R. Tao, J. Wang, X. Wang, Z. Asawatangtrakuldee, C. Ban, Y. Guo, Y. Li, Q. Li, W. Liu, S. Mao, Y. Qian, S.J. Wang, D. Zhang, L. Zou, W. Avila, C. Chaparro Sierra, L.F. Florez, C. Gomez, J.P. Gomez Moreno, B. Sanabria, J.C. Godinovic, N. Lelas, D. Polic, D. Puljak, I. Antunovic, Z. Kovac, M. Brigljevic, V. Kadija, K. Luetic, J. Mekterovic, D. Morovic, S. Tikvica, L. Attikis, A. Mavromanolakis, G. Mousa, J. Nicolaou, C. Ptochos, F. Razis, P.A. Bodlak, M. Finger, M. Finger, M. Assran, Y. Elgammal, S. Ellithi Kamel, A. Mahmoud, M.A. Mahrous, A. Radi, A. Kadastik, M. Müntel, M. Murumaa, M. Raidal, M. Tiko, A. Eerola, P. Fedi, G. Voutilainen, M. Härkönen, J. Karimäki, V. Kinnunen, R. Kortelainen, M.J. Lampén, T. Lassila-Perini, K. Lehti, S. Lindén, T. Luukka, P. Mäenpää, T. Peltola, T. Tuominen, E. Tuominiemi, J. Tuovinen, E. Wendland, L. Tuuva, T. Besancon, M. Couderc, F. Dejardin, M. Denegri, D. Fabbro, B. Faure, J.L. Favaro, C. Ferri, F. Ganjour, S. Givernaud, A. Gras, P. Hamel De Monchenault, G. Jarry, P. Locci, E. Malcles, J. Nayak, A. Rander, J. Rosowsky, A. Titov, M. Baffioni, S. Beaudette, F. Busson, P. Charlot, C. Daci, N. Dahms, T. Dalchenko, M. Dobrzynski, L. Filipovic, N. Florent, A. Granier De Cassagnac, R. Mastrolorenzo, L. Miné, P. Mironov, C. Naranjo, I.N. Nguyen, M. Ochando, C. Paganini, P. Sabes, D. Salerno, R. Sauvan, J.B. Sirois, Y. Veelken, C. Yilmaz, Y. Zabi, A. Agram, J.-L. Andrea, J. Aubin, A. Bloch, D. Brom, J.-M. Chabert, E.C. Collard, C. Conte, E. Drouhin, F. Fontaine, J.-C. Gelé, D. Goerlach, U. Goetzmann, C. Juillot, P. Le Bihan, A.-C. Van Hove, P. Gadrat, S. Beauceron, S. Beaupere, N. Boudoul, G. Brochet, S. Carrillo Montoya, C.A. Chasserat, J. Chierici, R. Contardo, D. Depasse, P. El Mamouni, H. Fan, J. Fay, J. Gascon, S. Gouzevitch, M. Ille, B. Kurca, T. Lethuillier, M. Mirabito, L. Perries, S. Ruiz Alvarez, J.D. Sgandurra, L. Sordini, V. Vander Donckt, M. Verdier, P. Viret, S. Xiao, H. Tsamalaidze, Z. Autermann, C. Beranek, S. Bontenackels, M. Calpas, B. Edelhoff, M. Feld, L. Hindrichs, O. Klein, K. Ostapchuk, A. Perieanu, A. Raupach, F. Sammet, J. Schael, S. Sprenger, D. Weber, H. Wittmer, B. Zhukov, V. Ata, M. Caudron, J. Dietz-Laursonn, E. Duchardt, D. Erdmann, M. Fischer, R. Güth, A. Hebbeker, T. Heidemann, C. Hoepfner, K. Klingebiel, D. Knutzen, S. Kreuzer, P. Merschmeyer, M. Meyer, A. Olschewski, M. Padeken, K. Papacz, P. Reithler, H. Schmitz, S.A. Sonnenschein, L. Teyssier, D. Thüer, S. Weber, M. Cherepanov, V. Erdogan, Y. Flügge, G. Geenen, H. Geisler, M. Haj Ahmad, W. Hoehle, F. Kargoll, B. Kress, T. Kuessel, Y. Lingemann, J. Nowack, A. Nugent, I.M. Perchalla, L. Pooth, O. Stahl, A. Asin, I. Bartosik, N. Behr, J. Behrenhoff, W. Behrens, U. Bell, A.J. Bergholz, M. Bethani, A. Borras, K. Burgmeier, A. Cakir, A. Calligaris, L. Campbell, A. Choudhury, S. Costanza, F. Diez Pardos, C. Dooling, S. Dorland, T. Eckerlin, G. Eckstein, D. Eichhorn, T. Flucke, G. Garay Garcia, J. Geiser, A. Grebenyuk, A. Gunnellini, P. Habib, S. Hauk, J. Hellwig, G. Hempel, M. Horton, D. Jung, H. Kasemann, M. Katsas, P. Kieseler, J. Kleinwort, C. Krämer, M. Krücker, D. Lange, W. Leonard, J. Lipka, K. Lohmann, W. Lutz, B. Mankel, R. Marfin, I. Melzer-Pellmann, I.-A. Meyer, A.B. Mnich, J. Mussgiller, A. Naumann-Emme, S. Novgorodova, O. Nowak, F. Ntomari, E. Perrey, H. Petrukhin, A. Pitzl, D. Placakyte, R. Raspereza, A. Ribeiro Cipriano, P.M. Riedl, C. Ron, E. Sahin, M.Ö. Salfeld-Nebgen, J. Saxena, P. Schmidt, R. Schoerner-Sadenius, T. Schröder, M. Stein, M. Vargas Trevino, A.D.R. Walsh, R. Wissing, C. Aldaya Martin, M. Blobel, V. Centis Vignali, M. Enderle, H. Erfle, J. Garutti, E. Goebel, K. Görner, M. Gosselink, M. Haller, J. Höing, R.S. Kirschenmann, H. Klanner, R. Kogler, R. Lange, J. Lapsien, T. Lenz, T. Marchesini, I. Ott, J. Peiffer, T. Pietsch, N. Rathjens, D. Sander, C. Schettler, H. Schleper, P. Schlieckau, E. Schmidt, A. Seidel, M. Sibille, J. Sola, V. Stadie, H. Steinbrück, G. Troendle, D. Usai, E. Vanelderen, L. Barth, C. Baus, C. Berger, J. Böser, C. Butz, E. Chwalek, T. De Boer, W. Descroix, A. Dierlamm, A. Feindt, M. Guthoff, M. Hartmann, F. Hauth, T. Held, H. Hoffmann, K.H. Husemann, U. Katkov, I. Kornmayer, A. Kuznetsova, E. Lobelle Pardo, P. Martschei, D. Mozer, M.U. Müller, Th. Niegel, M. Nürnberg, A. Oberst, O. Quast, G. Rabbertz, K. Ratnikov, F. Röcker, S. Schilling, F.-P. Schott, G. Simonis, H.J. Stober, F.M. Ulrich, R. Wagner-Kuhr, J. Wayand, S. Weiler, T. Wolf, R. Zeise, M. Anagnostou, G. Daskalakis, G. Geralis, T. Giakoumopoulou, V.A. Kesisoglou, S. Kyriakis, A. Loukas, D. Markou, A. Markou, C. Psallidas, A. Topsis-Giotis, I. Gouskos, L. Panagiotou, A. Saoulidou, N. Stiliaris, E. Aslanoglou, X. Evangelou, I. Flouris, G. Foudas, C. Jones, J. Kokkas, P. Manthos, N. Papadopoulos, I. Paradas, E. Bencze, G. Hajdu, C. Hidas, P. Horvath, D. Sikler, F. Veszpremi, V. Vesztergombi, G. Zsigmond, A.J. Beni, N. Czellar, S. Karancsi, J. Molnar, J. Palinkas, J. Szillasi, Z. Raics, P. Trocsanyi, Z.L. Ujvari, B. Swain, S.K. Beri, S.B. Bhatnagar, V. Dhingra, N. Gupta, R. Kalsi, A.K. Kaur, M. Mittal, M. Nishu, N. Sharma, A. Singh, J.B. Kumar, A. Kumar, A. Ahuja, S. Bhardwaj, A. Choudhary, B.C. Kumar, A. Malhotra, S. Naimuddin, M. Ranjan, K. Sharma, V. Shivpuri, R.K. Banerjee, S. Bhattacharya, S. Chatterjee, K. Dutta, S. Gomber, B. Jain, Sa. Jain, Sh. Khurana, R. Modak, A. Mukherjee, S. Roy, D. Sarkar, S. Sharan, M. Singh, A.P. Abdulsalam, A. Dutta, D. Kailas, S. Kumar, V. Mohanty, A.K. Pant, L.M. Shukla, P. Topkar, A. Aziz, T. Chatterjee, R.M. Ganguly, S. Ghosh, S. Guchait, M. Gurtu, A. Kole, G. Kumar, S. Maity, M. Majumder, G. Mazumdar, K. Mohanty, G.B. Parida, B. Sudhakar, K. Wickramage, N. Banerjee, S. Dewanjee, R.K. Dugad, S. Arfaei, H. Bakhshiansohi, H. Behnamian, H. Etesami, S.M. Fahim, A. Jafari, A. Khakzad, M. Mohammadi Najafabadi, M. Naseri, M. Paktinat Mehdiabadi, S. Safarzadeh, B. Zeinali, M. Grunewald, M. Abbrescia, M. Barbone, L. Calabria, C. Chhibra, S.S. Colaleo, A. Creanza, D. De Filippis, N. De Palma, M. Fiore, L. Iaselli, G. Maggi, G. Maggi, M. My, S. Nuzzo, S. Pacifico, N. Pompili, A. Pugliese, G. Radogna, R. Selvaggi, G. Silvestris, L. Singh, G. Venditti, R. Verwilligen, P. Zito, G. Abbiendi, G. Benvenuti, A.C. Bonacorsi, D. Braibant-Giacomelli, S. Brigliadori, L. Campanini, R. Capiluppi, P. Castro, A. Cavallo, F.R. Codispoti, G. Cuffiani, M. Dallavalle, G.M. Fabbri, F. Fanfani, A. Fasanella, D. Giacomelli, P. Grandi, C. Guiducci, L. Marcellini, S. Masetti, G. Meneghelli, M. Montanari, A. Navarria, F.L. Odorici, F. Perrotta, A. Primavera, F. Rossi, A.M. Rovelli, T. Siroli, G.P. Tosi, N. Travaglini, R. Albergo, S. Cappello, G. Chiorboli, M. Costa, S. Giordano, F. Potenza, R. Tricomi, A. Tuve, C. Barbagli, G. Ciulli, V. Civinini, C. D'Alessandro, R. Focardi, E. Gallo, E. Gonzi, S. Gori, V. Lenzi, P. Meschini, M. Paoletti, S. Sguazzoni, G. Tropiano, A. Benussi, L. Bianco, S. Fabbri, F. Piccolo, D. Fabbricatore, P. Ferro, F. Lo Vetere, M. Musenich, R. Robutti, E. Tosi, S. Dinardo, M.E. Fiorendi, S. Gennai, S. Gerosa, R. Ghezzi, A. Govoni, P. Lucchini, M.T. Malvezzi, S. Manzoni, R.A. Martelli, A. Marzocchi, B. Menasce, D. Moroni, L. Paganoni, M. Pedrini, D. Ragazzi, S. Redaelli, N. Tabarelli De Fatis, T. Buontempo, S. Cavallo, N. Di Guida, S. Fabozzi, F. Iorio, A.O.M. Lista, L. Meola, S. Merola, M. Paolucci, P. Azzi, P. Bacchetta, N. Bellato, M. Biasotto, M. Branca, A. Checchia, P. Dorigo, T. Dosselli, U. Galanti, M. Gasparini, F. Gasparini, U. Giubilato, P. Gozzelino, A. Kanishchev, K. Lacaprara, S. Lazzizzera, I. Margoni, M. Meneguzzo, A.T. Pazzini, J. Pozzobon, N. Ronchese, P. Simonetto, F. Torassa, E. Tosi, M. Zotto, P. Zucchetta, A. Zumerle, G. Gabusi, M. Ratti, S.P. Riccardi, C. Salvini, P. Vitulo, P. Biasini, M. Bilei, G.M. Fanò, L. Lariccia, P. Mantovani, G. Menichelli, M. Romeo, F. Saha, A. Santocchia, A. Spiezia, A. Androsov, K. Azzurri, P. Bagliesi, G. Bernardini, J. Boccali, T. Broccolo, G. Castaldi, R. Ciocci, M.A. Dell'Orso, R. Donato, S. Fiori, F. Foà, L. Giassi, A. Grippo, M.T. Kraan, A. Ligabue, F. Lomtadze, T. Martini, L. Messineo, A. Moon, C.S. Palla, F. Rizzi, A. Savoy-Navarro, A. Serban, A.T. Spagnolo, P. Squillacioti, P. Tenchini, R. Tonelli, G. Venturi, A. Verdini, P.G. Vernieri, C. Barone, L. Cavallari, F. Del Re, D. Diemoz, M. Grassi, M. Jorda, C. Longo, E. Margaroli, F. Meridiani, P. Micheli, F. Nourbakhsh, S. Organtini, G. Paramatti, R. Rahatlou, S. Rovelli, C. Soffi, L. Traczyk, P. Amapane, N. Arcidiacono, R. Argiro, S. Arneodo, M. Bellan, R. Biino, C. Cartiglia, N. Casasso, S. Costa, M. Degano, A. Demaria, N. Finco, L. Mariotti, C. Maselli, S. Migliore, E. Monaco, V. Musich, M. Obertino, M.M. Ortona, G. Pacher, L. Pastrone, N. Pelliccioni, M. Pinna Angioni, G.L. Potenza, A. Romero, A. Ruspa, M. Sacchi, R. Solano, A. Staiano, A. Tamponi, U. Belforte, S. Candelise, V. Casarsa, M. Cossutti, F. Della Ricca, G. Gobbo, B. La Licata, C. Marone, M. Montanino, D. Schizzi, A. Umer, T. Zanetti, A. Chang, S. Kim, T.Y. Nam, S.K. Kim, D.H. Kim, G.N. Kim, J.E. Kim, M.S. Kong, D.J. Lee, S. Oh, Y.D. Park, H. Sakharov, A. Son, D.C. Kim, J.Y. Kim, Z.J. Song, S. Choi, S. Gyun, D. Hong, B. Jo, M. Kim, H. Kim, Y. Lee, B. Lee, K.S. Park, S.K. Roh, Y. Choi, M. Kim, J.H. Park, C. Park, I.C. Park, S. Ryu, G. Choi, Y. Choi, Y.K. Goh, J. Kwon, E. Lee, J. Seo, H. Yu, I. Juodagalvis, A. Komaragiri, J.R. Castilla-Valdez, H. De La Cruz-Burelo, E. Heredia-De La Cruz, I. Lopez-Fernandez, R. Martínez-Ortega, J. Sanchez-Hernandez, A. Villasenor-Cendejas, L.M. Carrillo Moreno, S. Vazquez Valencia, F. Salazar Ibarguen, H.A. Casimiro Linares, E. Morelos Pineda, A. Krofcheck, D. Butler, P.H. Doesburg, R. Reucroft, S. Ahmad, A. Ahmad, M. Asghar, M.I. Butt, J. Hassan, Q. Hoorani, H.R. Khan, W.A. Khurshid, T. Qazi, S. Shah, M.A. Shoaib, M. Bialkowska, H. Bluj, M. Boimska, B. Frueboes, T. Górski, M. Kazana, M. Nawrocki, K. Romanowska-Rybinska, K. Szleper, M. Wrochna, G. Zalewski, P. Brona, G. Bunkowski, K. Cwiok, M. Dominik, W. Doroba, K. Kalinowski, A. Konecki, M. Krolikowski, J. Misiura, M. Wolszczak, W. Bargassa, P. Beirão Da Cruz E Silva, C. Faccioli, P. Ferreira Parracho, P.G. Gallinaro, M. Nguyen, F. Rodrigues Antunes, J. Seixas, J. Varela, J. Vischia, P. Golutvin, I. Kamenev, A. Karjavin, V. Konoplyanikov, V. Korenkov, V. Kozlov, G. Lanev, A. Malakhov, A. Matveev, V. Moisenz, P. Palichik, V. Perelygin, V. Savina, M. Shmatov, S. Shulha, S. Smirnov, V. Tikhonenko, E. Zarubin, A. Golovtsov, V. Ivanov, Y. Kim, V. Levchenko, P. Murzin, V. Oreshkin, V. Smirnov, I. Sulimov, V. Uvarov, L. Vavilov, S. Vorobyev, A. Vorobyev, An. Andreev, Yu. Dermenev, A. Gninenko, S. Golubev, N. Kirsanov, M. Krasnikov, N. Pashenkov, A. Tlisov, D. Toropin, A. Epshteyn, V. Gavrilov, V. Lychkovskaya, N. Popov, V. Safronov, G. Semenov, S. Spiridonov, A. Stolin, V. Vlasov, E. Zhokin, A. Andreev, V. Azarkin, M. Dremin, I. Kirakosyan, M. Leonidov, A. Mesyats, G. Rusakov, S.V. Vinogradov, A. Belyaev, A. Boos, E. Dubinin, M. Dudko, L. Ershov, A. Gribushin, A. Klyukhin, V. Kodolova, O. Lokhtin, I. Obraztsov, S. Petrushanko, S. Savrin, V. Snigirev, A. Azhgirey, I. Bayshev, I. Bitioukov, S. Kachanov, V. Kalinin, A. Konstantinov, D. Krychkine, V. Petrov, V. Ryutin, R. Sobol, A. Tourtchanovitch, L. Troshin, S. Tyurin, N. Uzunian, A. Volkov, A. Adzic, P. Djordjevic, M. Ekmedzic, M. Milosevic, J. Aguilar-Benitez, M. Alcaraz Maestre, J. Battilana, C. Calvo, E. Cerrada, M. Chamizo Llatas, M. Colino, N. De La Cruz, B. Delgado Peris, A. Domínguez Vázquez, D. Escalante Del Valle, A. Fernandez Bedoya, C. Fernández Ramos, J.P. Ferrando, A. Flix, J. Fouz, M.C. Garcia-Abia, P. Gonzalez Lopez, O. Goy Lopez, S. Hernandez, J.M. Josa, M.I. Merino, G. Navarro De Martino, E. Pérez-Calero Yzquierdo, A. Puerta Pelayo, J. Quintario Olmeda, A. Redondo, I. Romero, L. Soares, M.S. Willmott, C. Albajar, C. De Trocóniz, J.F. Missiroli, M. Brun, H. Cuevas, J. Fernandez Menendez, J. Folgueras, S. Gonzalez Caballero, I. Lloret Iglesias, L. Brochero Cifuentes, J.A. Cabrillo, I.J. Calderon, A. Duarte Campderros, J. Fernandez, M. Gomez, G. Gonzalez Sanchez, J. Graziano, A. Lopez Virto, A. Marco, J. Marco, R. Martinez Rivero, C. Matorras, F. Munoz Sanchez, F.J. Piedra Gomez, J. Rodrigo, T. Rodríguez-Marrero, A.Y. Ruiz-Jimeno, A. Scodellaro, L. Vila, I. Vilar Cortabitarte, R. Abbaneo, D. Auffray, E. Auzinger, G. Bachtis, M. Baillon, P. Ball, A.H. Barney, D. Benaglia, A. Bendavid, J. Benhabib, L. Benitez, J.F. Bernet, C. Bianchi, G. Bloch, P. Bocci, A. Bonato, A. Bondu, O. Botta, C. Breuker, H. Camporesi, T. Cerminara, G. Christiansen, T. Coarasa Perez, J.A. Colafranceschi, S. D'Alfonso, M. D'Enterria, D. Dabrowski, A. David, A. De Guio, F. De Roeck, A. De Visscher, S. Dobson, M. Dupont-Sagorin, N. Elliott-Peisert, A. Eugster, J. Franzoni, G. Funk, W. Giffels, M. Gigi, D. Gill, K. Giordano, D. Girone, M. Giunta, M. Glege, F. Gomez-Reino Garrido, R. Gowdy, S. Guida, R. Hammer, J. Hansen, M. Harris, P. Hegeman, J. Innocente, V. Janot, P. Karavakis, E. Kousouris, K. Krajczar, K. Lecoq, P. Lourenço, C. Magini, N. Malgeri, L. Mannelli, M. Masetti, L. Meijers, F. Mersi, S. Meschi, E. Moortgat, F. Mulders, M. Musella, P. Orsini, L. Palencia Cortezon, E. Pape, L. Perez, E. Perrozzi, L. Petrilli, A. Petrucciani, G. Pfeiffer, A. Pierini, M. Pimiä, M. Piparo, D. Plagge, M. Racz, A. Reece, W. Rolandi, G. Rovere, M. Sakulin, H. Santanastasio, F. Schäfer, C. Schwick, C. Sekmen, S. Sharma, A. Siegrist, P. Silva, P. Simon, M. Sphicas, P. Spiga, D. Steggemann, J. Stieger, B. Stoye, M. Treille, D. Tsirou, A. Veres, G.I. Vlimant, J.R. Wöhri, H.K. Zeuner, W.D. Bertl, W. Deiters, K. Erdmann, W. Horisberger, R. Ingram, Q. Kaestli, H.C. König, S. Kotlinski, D. Langenegger, U. Renker, D. Rohe, T. Bachmair, F. Bäni, L. Bianchini, L. Bortignon, P. Buchmann, M.A. Casal, B. Chanon, N. Deisher, A. Dissertori, G. Dittmar, M. Donegà, M. Dünser, M. Eller, P. Grab, C. Hits, D. Lustermann, W. Mangano, B. Marini, A.C. Martinez Ruiz Del Arbol, P. Meister, D. Mohr, N. Nägeli, C. Nef, P. Nessi-Tedaldi, F. Pandolfi, F. Pauss, F. Peruzzi, M. Quittnat, M. Rebane, L. Ronga, F.J. Rossini, M. Starodumov, A. Takahashi, M. Theofilatos, K. Wallny, R. Weber, H.A. Amsler, C. Canelli, M.F. Chiochia, V. De Cosa, A. Hinzmann, A. Hreus, T. Ivova Rikova, M. Kilminster, B. Millan Mejias, B. Ngadiuba, J. Robmann, P. Snoek, H. Taroni, S. Verzetti, M. Yang, Y. 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Leggat, D. Leslie, D. Martin, W. Reid, I.D. Symonds, P. Teodorescu, L. Turner, M. Dittmann, J. Hatakeyama, K. Kasmi, A. Liu, H. Scarborough, T. Charaf, O. Cooper, S.I. Henderson, C. Rumerio, P. Avetisyan, A. Bose, T. Fantasia, C. Heister, A. Lawson, P. Lazic, D. Richardson, C. Rohlf, J. Sperka, D. St. John, J. Sulak, L. Alimena, J. Bhattacharya, S. Christopher, G. Cutts, D. Demiragli, Z. Ferapontov, A. Garabedian, A. Heintz, U. Jabeen, S. Kukartsev, G. Laird, E. Landsberg, G. Luk, M. Narain, M. Segala, M. Sinthuprasith, T. Speer, T. Swanson, J. Breedon, R. Breto, G. Calderon De La Barca Sanchez, M. Chauhan, S. Chertok, M. Conway, J. Conway, R. Cox, P.T. Erbacher, R. Gardner, M. Ko, W. Kopecky, A. Lander, R. Miceli, T. Mulhearn, M. Pellett, D. Pilot, J. Ricci-Tam, F. Rutherford, B. Searle, M. Shalhout, S. Smith, J. Squires, M. Tripathi, M. Wilbur, S. Yohay, R. Andreev, V. Cline, D. Cousins, R. Erhan, S. Everaerts, P. Farrell, C. Felcini, M. Hauser, J. Ignatenko, M. Jarvis, C. 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Carroll, R. Ferguson, T. Iiyama, Y. Jang, D.W. Paulini, M. Russ, J. Vogel, H. Vorobiev, I. Cumalat, J.P. Drell, B.R. Ford, W.T. Gaz, A. Luiggi Lopez, E. Nauenberg, U. Smith, J.G. Stenson, K. Ulmer, K.A. Wagner, S.R. Alexander, J. Chatterjee, A. Chu, J. Eggert, N. Gibbons, L.K. Hopkins, W. Khukhunaishvili, A. Kreis, B. Mirman, N. Nicolas Kaufman, G. Patterson, J.R. Ryd, A. Salvati, E. Sun, W. Teo, W.D. Thom, J. Thompson, J. Tucker, J. Weng, Y. Winstrom, L. Wittich, P. Winn, D. Abdullin, S. Albrow, M. Anderson, J. Apollinari, G. Bauerdick, L.A.T. Beretvas, A. Berryhill, J. Bhat, P.C. Burkett, K. Butler, J.N. Chetluru, V. Cheung, H.W.K. Chlebana, F. Cihangir, S. Elvira, V.D. Fisk, I. Freeman, J. Gao, Y. Gottschalk, E. Gray, L. Green, D. Grünendahl, S. Gutsche, O. Hanlon, J. Hare, D. Harris, R.M. Hirschauer, J. Hooberman, B. Jindariani, S. Johnson, M. Joshi, U. Kaadze, K. Klima, B. Kwan, S. Linacre, J. Lincoln, D. Lipton, R. Liu, T. Lykken, J. Maeshima, K. Marraffino, J.M. Martinez Outschoorn, V.I. Maruyama, S. Mason, D. McBride, P. Mishra, K. Mrenna, S. Musienko, Y. Nahn, S. Newman-Holmes, C. O'Dell, V. Prokofyev, O. Ratnikova, N. Sexton-Kennedy, E. Sharma, S. Soha, A. Spalding, W.J. Spiegel, L. Taylor, L. Tkaczyk, S. Tran, N.V. Uplegger, L. Vaandering, E.W. Vidal, R. Whitbeck, A. Whitmore, J. Wu, W. Yang, F. Yun, J.C. Acosta, D. Avery, P. Bourilkov, D. Cheng, T. Das, S. De Gruttola, M. Di Giovanni, G.P. Dobur, D. Field, R.D. Fisher, M. Fu, Y. Furic, I.K. Hugon, J. Kim, B. Konigsberg, J. Korytov, A. Kropivnitskaya, A. Kypreos, T. Low, J.F. Matchev, K. Milenovic, P. Mitselmakher, G. Muniz, L. Rinkevicius, A. Shchutska, L. Skhirtladze, N. Snowball, M. Yelton, J. Zakaria, M. Gaultney, V. Hewamanage, S. Linn, S. Markowitz, P. Martinez, G. Rodriguez, J.L. Adams, T. Askew, A. Bochenek, J. Chen, J. Diamond, B. Haas, J. Hagopian, S. Hagopian, V. Johnson, K.F. Prosper, H. Veeraraghavan, V. Weinberg, M. Baarmand, M.M. Dorney, B. Hohlmann, M. Kalakhety, H. Yumiceva, F. Adams, M.R. Apanasevich, L. Bazterra, V.E. Betts, R.R. Bucinskaite, I. Cavanaugh, R. Evdokimov, O. Gauthier, L. Gerber, C.E. Hofman, D.J. Khalatyan, S. Kurt, P. Moon, D.H. O'Brien, C. Silkworth, C. Turner, P. Varelas, N. Akgun, U. Albayrak, E.A. Bilki, B. Clarida, W. Dilsiz, K. Duru, F. Haytmyradov, M. Merlo, J.-P. Mermerkaya, H. Mestvirishvili, A. Moeller, A. Nachtman, J. Ogul, H. Onel, Y. Ozok, F. Penzo, A. Rahmat, R. Sen, S. Tan, P. Tiras, E. Wetzel, J. Yetkin, T. Yi, K. Barnett, B.A. Blumenfeld, B. Bolognesi, S. Fehling, D. Gritsan, A.V. Maksimovic, P. Martin, C. Swartz, M. Baringer, P. Bean, A. Benelli, G. Gray, J. Kenny, R.P., III Murray, M. Noonan, D. Sanders, S. Sekaric, J. Stringer, R. Wang, Q. Wood, J.S. Barfuss, A.F. Chakaberia, I. Ivanov, A. Khalil, S. Makouski, M. Maravin, Y. Saini, L.K. Shrestha, S. Svintradze, I. Gronberg, J. Lange, D. Rebassoo, F. Wright, D. Baden, A. Calvert, B. Eno, S.C. Gomez, J.A. Hadley, N.J. Kellogg, R.G. Kolberg, T. Lu, Y. 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Nash, D. Orimoto, T. Trocino, D. Wood, D. Zhang, J. Anastassov, A. Hahn, K.A. Kubik, A. Lusito, L. Mucia, N. Odell, N. Pollack, B. Pozdnyakov, A. Schmitt, M. Stoynev, S. Sung, K. Velasco, M. Won, S. Berry, D. Brinkerhoff, A. Chan, K.M. Drozdetskiy, A. Hildreth, M. Jessop, C. Karmgard, D.J. Kellams, N. Kolb, J. Lannon, K. Luo, W. Lynch, S. Marinelli, N. Morse, D.M. Pearson, T. Planer, M. Ruchti, R. Slaunwhite, J. Valls, N. Wayne, M. Wolf, M. Woodard, A. Antonelli, L. Bylsma, B. Durkin, L.S. Flowers, S. Hill, C. Hughes, R. Kotov, K. Ling, T.Y. Puigh, D. Rodenburg, M. Smith, G. Vuosalo, C. Winer, B.L. Wolfe, H. Wulsin, H.W. Berry, E. Elmer, P. Halyo, V. Hebda, P. Hunt, A. Jindal, P. Koay, S.A. Lujan, P. Marlow, D. Medvedeva, T. Mooney, M. Olsen, J. Piroué, P. Quan, X. Raval, A. Saka, H. Stickland, D. Tully, C. Werner, J.S. Zenz, S.C. Zuranski, A. Brownson, E. Lopez, A. Mendez, H. Ramirez Vargas, J.E. Alagoz, E. Barnes, V.E. Benedetti, D. Bolla, G. Bortoletto, D. De Mattia, M. Everett, A. Hu, Z. Jha, M.K. Jones, M. Jung, K. Kress, M. Leonardo, N. Lopes Pegna, D. Maroussov, V. Merkel, P. Miller, D.H. Neumeister, N. Radburn-Smith, B.C. Shipsey, I. Silvers, D. Svyatkovskiy, A. Wang, F. Xie, W. Xu, L. Yoo, H.D. Zablocki, J. Zheng, Y. Parashar, N. Stupak, J. Adair, A. Akgun, B. Ecklund, K.M. Geurts, F.J.M. Li, W. Michlin, B. Padley, B.P. Redjimi, R. Roberts, J. Zabel, J. Betchart, B. Bodek, A. Covarelli, R. De Barbaro, P. Demina, R. Eshaq, Y. Ferbel, T. Garcia-Bellido, A. Goldenzweig, P. Han, J. Harel, A. Miner, D.C. Petrillo, G. Vishnevskiy, D. Zielinski, M. Bhatti, A. Ciesielski, R. Demortier, L. Goulianos, K. Lungu, G. Malik, S. Mesropian, C. Arora, S. Barker, A. Chou, J.P. Contreras-Campana, C. Contreras-Campana, E. Duggan, D. Ferencek, D. Gershtein, Y. Gray, R. Halkiadakis, E. Hidas, D. Lath, A. Panwalkar, S. Park, M. Patel, R. Rekovic, V. Robles, J. Salur, S. Schnetzer, S. Seitz, C. Somalwar, S. Stone, R. Thomas, S. Thomassen, P. Walker, M. Rose, K. Spanier, S. 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Savin, A. Smith, W.H. Woods, N.

Subjects
High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract

The razor approach to search for R-parity conserving supersymmetric particles is described in detail. Two analyses are considered: an inclusive search for new heavy particle pairs decaying to final states with at least two jets and missing transverse energy, and a dedicated search for final states with at least one jet originating from a bottom quark. For both the inclusive study and the study requiring a bottom-quark jet, the data are examined in exclusive final states corresponding to all-hadronic, single-lepton, and dilepton events. The study is based on the data set of proton-proton collisions at s=7TeV collected with the CMS detector at the LHC in 2011, corresponding to an integrated luminosity of 4.7fb-1. The study consists of a shape analysis performed in the plane of two kinematic variables, denoted MR and R2, that correspond to the mass and transverse energy flow, respectively, of pair-produced, heavy, new-physics particles. The data are found to be compatible with the background model, defined by studying event simulations and data control samples. Exclusion limits for squark and gluino production are derived in the context of the constrained minimal supersymmetric standard model (CMSSM) and also for simplified-model spectra (SMS). Within the CMSSM parameter space considered, squark and gluino masses up to 1350 GeV are excluded at 95% confidence level, depending on the model parameters. For SMS scenarios, the direct production of pairs of top or bottom squarks is excluded for masses as high as 400 GeV. © 2014 CERN, for the CMS Collaboration.

Published
2014

34. Spin excitations in the two-dimensional strongly coupled dimer system malachite

Author

D. T. Adroja, Jon W. Taylor, M. Enderle, B. Fåk, Reinhard K. Kremer, Elijah E. Gordon, J. H. Chun, Emmanuel Canévet, Myung-Hwan Whangbo, Jerry L. Bettis, Université Paris-Sud - Paris 11 (UP11), Institut Laue-Langevin (ILL), ILL, Instrumentation, Material and Correlated Electrons Physics (IMAPEC), PHotonique, ELectronique et Ingénierie QuantiqueS (PHELIQS), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), North Carolina State University [Raleigh] (NC State), University of North Carolina System (UNC), ISIS Facility, STFC Rutherford Appleton Laboratory (RAL), Science and Technology Facilities Council (STFC)-Science and Technology Facilities Council (STFC), and ANR-12-BS04-0021,SpinLiq,Liquides de spin frustrés(2012)

Subjects
Dimer, Cu2(OH)2Co3, Augmented-Wave Method, FOS: Physical sciences, 02 engineering and technology, 01 natural sciences, Inelastic neutron scattering, Condensed Matter - Strongly Correlated Electrons, chemistry.chemical_compound, Lattice (order), 0103 physical sciences, 010306 general physics, Quantum, Physics, [PHYS]Physics [physics], Condensed matter physics, Strongly Correlated Electrons (cond-mat.str-el), Azurite, Chains, Malachite, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Square lattice, Antiferromagnet, Electronic, Optical and Magnetic Materials, chemistry, visual_art, visual_art.visual_art_medium, Condensed Matter::Strongly Correlated Electrons, 0210 nano-technology, Ground state, Excitation, Model
Abstract

International audience; The mineral malachite, Cu-2(OD)(2)CO3, has a quantum spin-liquid ground state and no long-range magnetic order down to at least T = 0.4 K. Inelastic neutron scattering measurements show that the excitation spectrum consists of dispersive gapped singlet-triplet excitations, characteristic of spin-1/2 dimer-forming Heisenberg antiferromagnets. We identify a distinct two-dimensional dimerized coupling scheme with strong interdimer coupling J'/J(1) approximate to 0.3 that places malachite between strongly coupled alternating chains, square lattice antiferromagnets, and infinite-legged ladders. The geometry of the interaction scheme resembles the staggered dimer lattice, which may allow unconventional quantum criticality.

Published
2014
Full Text
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35. Alignment of the CMS tracker with LHC and cosmic ray data

Author

The CMS collaboration Chatrchyan, S. Khachatryan, V. Sirunyan, A.M. Tumasyan, A. Adam, W. Bergauer, T. Dragicevic, M. Erö, J. Fabjan, C. Friedl, M. Frühwirth, R. Ghete, V.M. Hartl, C. Hörmann, N. Hrubec, J. Jeitler, M. Kiesenhofer, W. Knünz, V. Krammer, M. Krätschmer, I. Liko, D. Mikulec, I. Rabady, D. Rahbaran, B. Rohringer, H. Schöfbeck, R. Strauss, J. Taurok, A. Treberer-Treberspurg, W. Waltenberger, W. Wulz, C.-E. Mossolov, V. Shumeiko, N. Suarez Gonzalez, J. Alderweireldt, S. Bansal, M. Bansal, S. Beaumont, W. Cornelis, T. De Wolf, E.A. Janssen, X. Knutsson, A. Luyckx, S. Mucibello, L. Ochesanu, S. Roland, B. Rougny, R. Van Haevermaet, H. Van Mechelen, P. Van Remortel, N. Van Spilbeeck, A. Blekman, F. Blyweert, S. D’Hondt, J. Devroede, O. Heracleous, N. Kalogeropoulos, A. Keaveney, J. Kim, T.J. Lowette, S. Maes, M. Olbrechts, A. Python, Q. Strom, D. Tavernier, S. Van Doninck, W. Van Lancker, L. Van Mulders, P. Van Onsem, G.P. Villella, I. Caillol, C. Clerbaux, B. De Lentdecker, G. Favart, L. Gay, A.P.R. Léonard, A. Marage, P.E. Mohammadi, A. Perniè, L. Reis, T. Seva, T. Thomas, L. Vander Velde, C. Vanlaer, P. Wang, J. Adler, V. Beernaert, K. Benucci, L. Cimmino, A. Costantini, S. Dildick, S. Garcia, G. Klein, B. Lellouch, J. Mccartin, J. Ocampo Rios, A.A. Ryckbosch, D. Salva Diblen, S. Sigamani, M. Strobbe, N. Thyssen, F. Tytgat, M. Walsh, S. Yazgan, E. Zaganidis, N. Basegmez, S. Beluffi, C. Bruno, G. Castello, R. Caudron, A. Ceard, L. Da Silveira, G.G. De Callatay, B. Delaere, C. du Pree, T. Favart, D. Forthomme, L. Giammanco, A. Hollar, J. Jez, P. Komm, M. Lemaitre, V. Liao, J. Michotte, D. Militaru, O. Nuttens, C. Pagano, D. Pin, A. Piotrzkowski, K. Popov, A. Quertenmont, L. Selvaggi, M. Vidal Marono, M. Vizan Garcia, J.M. Beliy, N. Caebergs, T. Daubie, E. Hammad, G.H. Alves, G.A. Correa Martins Junior, M. Martins, T. Pol, M.E. Souza, M.H.G. Aldá Júnior, W.L. Carvalho, W. Chinellato, J. Custódio, A. Da Costa, E.M. De Jesus Damiao, D. De Oliveira Martins, C. Fonseca De Souza, S. Malbouisson, H. Malek, M. Matos Figueiredo, D. Mundim, L. Nogima, H. Prado Da Silva, W.L. Santaolalla, J. Santoro, A. Sznajder, A. Tonelli Manganote, E.J. Vilela Pereira, A. Bernardes, C.A. Dias, F.A. Fernandez Perez Tomei, T.R. Gregores, E.M. Mercadante, P.G. Novaes, S.F. Padula, S.S. Genchev, V. Iaydjiev, P. Marinov, A. Piperov, S. Rodozov, M. Sultanov, G. Vutova, M. Dimitrov, A. Glushkov, I. Hadjiiska, R. Kozhuharov, V. Litov, L. Pavlov, B. Petkov, P. Bian, J.G. Chen, G.M. Chen, H.S. Chen, M. Du, R. Jiang, C.H. Liang, D. Liang, S. Meng, X. Plestina, R. Tao, J. Wang, X. Wang, Z. Asawatangtrakuldee, C. Ban, Y. Guo, Y. Li, Q. Li, W. Liu, S. Mao, Y. Qian, S.J. Wang, D. Zhang, L. Zou, W. Avila, C. Carrillo Montoya, C.A. Chaparro Sierra, L.F. Florez, C. Gomez, J.P. Gomez Moreno, B. Sanabria, J.C. Godinovic, N. Lelas, D. Polic, D. Puljak, I. Antunovic, Z. Kovac, M. Brigljevic, V. Kadija, K. Luetic, J. Mekterovic, D. Morovic, S. Tikvica, L. Attikis, A. Mavromanolakis, G. Mousa, J. Nicolaou, C. Ptochos, F. Razis, P.A. Finger, M. Finger, M., Jr. Abdelalim, A.A. Assran, Y. Elgammal, S. Ellithi Kamel, A. Mahmoud, M.A. Radi, A. Kadastik, M. Müntel, M. Murumaa, M. Raidal, M. Rebane, L. Tiko, A. Eerola, P. Fedi, G. Voutilainen, M. Härkönen, J. Karimäki, V. Kinnunen, R. Kortelainen, M.J. Lampén, T. Lassila-Perini, K. Lehti, S. Lindén, T. Luukka, P. Mäenpää, T. Peltola, T. Tuominen, E. Tuominiemi, J. Tuovinen, E. Wendland, L. Tuuva, T. Besancon, M. Couderc, F. Dejardin, M. Denegri, D. Fabbro, B. Faure, J.L. Ferri, F. Ganjour, S. Givernaud, A. Gras, P. Hamel de Monchenault, G. Jarry, P. Locci, E. Malcles, J. Nayak, A. Rander, J. Rosowsky, A. Titov, M. Baffioni, S. Beaudette, F. Busson, P. Charlot, C. Daci, N. Dahms, T. Dalchenko, M. Dobrzynski, L. Florent, A. Granier de Cassagnac, R. Miné, P. Mironov, C. Naranjo, I.N. Nguyen, M. Ochando, C. Paganini, P. Sabes, D. Salerno, R. Sauvan, J.B. Sirois, Y. Veelken, C. Yilmaz, Y. Zabi, A. Agram, J.-L. Andrea, J. Bloch, D. Bonnin, C. Brom, J.-M. Chabert, E.C. Charles, L. Collard, C. Conte, E. Drouhin, F. Fontaine, J.-C. Gelé, D. Goerlach, U. Goetzmann, C. Gross, L. Juillot, P. Le Bihan, A.-C. Van Hove, P. Gadrat, S. Baulieu, G. Beauceron, S. Beaupere, N. Boudoul, G. Brochet, S. Chasserat, J. Chierici, R. Contardo, D. Depasse, P. El Mamouni, H. Fan, J. Fay, J. Gascon, S. Gouzevitch, M. Ille, B. Kurca, T. Lethuillier, M. Lumb, N. Mathez, H. Mirabito, L. Perries, S. Ruiz Alvarez, J.D. Sgandurra, L. Sordini, V. Vander Donckt, M. Verdier, P. Viret, S. Xiao, H. Zoccarato, Y. Tsamalaidze, Z. Autermann, C. Beranek, S. Bontenackels, M. Calpas, B. Edelhoff, M. Esser, H. Feld, L. Hindrichs, O. Karpinski, W. Klein, K. Kukulies, C. Lipinski, M. Ostapchuk, A. Perieanu, A. Pierschel, G. Preuten, M. Raupach, F. Sammet, J. Schael, S. Schulte, J.F. Schwering, G. Sprenger, D. Verlage, T. Weber, H. Wittmer, B. Wlochal, M. Zhukov, V. Ata, M. Caudron, J. Dietz-Laursonn, E. Duchardt, D. Erdmann, M. Fischer, R. Güth, A. Hebbeker, T. Heidemann, C. Hoepfner, K. Klingebiel, D. Knutzen, S. Kreuzer, P. Merschmeyer, M. Meyer, A. Olschewski, M. Padeken, K. Papacz, P. Reithler, H. Schmitz, S.A. Sonnenschein, L. Teyssier, D. Thüer, S. Weber, M. Cherepanov, V. Erdogan, Y. Flügge, G. Geenen, H. Geisler, M. Haj Ahmad, W. Hoehle, F. Kargoll, B. Kress, T. Kuessel, Y. Lingemann, J. Nowack, A. Nugent, I.M. Perchalla, L. Pistone, C. Pooth, O. Stahl, A. Asin, I. Bartosik, N. Behr, J. Behrenhoff, W. Behrens, U. Bell, A.J. Bergholz, M. Bethani, A. Borras, K. Burgmeier, A. Cakir, A. Calligaris, L. Campbell, A. Choudhury, S. Costanza, F. Diez Pardos, C. Dolinska, G. Dooling, S. Dorland, T. Eckerlin, G. Eckstein, D. Eichhorn, T. Flucke, G. Geiser, A. Grebenyuk, A. Gunnellini, P. Habib, S. Hampe, J. Hansen, K. Hauk, J. Hellwig, G. Hempel, M. Horton, D. Jung, H. Kasemann, M. Katsas, P. Kieseler, J. Kleinwort, C. Korol, I. Krämer, M. Krücker, D. Lange, W. Leonard, J. Lipka, K. Lohmann, W. Lutz, B. Mankel, R. Marfin, I. Maser, H. Melzer-Pellmann, I.-A. Meyer, A.B. Mnich, J. Muhl, C. Mussgiller, A. Naumann-Emme, S. Novgorodova, O. Nowak, F. Olzem, J. Parenti, A. Perrey, H. Petrukhin, A. Pitzl, D. Placakyte, R. Raspereza, A. Ribeiro Cipriano, P.M. Riedl, C. Ron, E. Sahin, M.Ö. Salfeld-Nebgen, J. Saxena, P. Schmidt, R. Schoerner-Sadenius, T. Schröder, M. Spannagel, S. Stein, M. Tomaszewska, J. Vargas Trevino, A.D.R. Walsh, R. Wissing, C. Zuber, A. Aldaya Martin, M. Berger, L.O. Biskop, H. Blobel, V. Buhmann, P. Centis Vignali, M. Enderle, H. Erfle, J. Frensche, B. Garutti, E. Goebel, K. Görner, M. Gosselink, M. Haller, J. Hoffmann, M. Höing, R.S. Junkes, A. Kirschenmann, H. Klanner, R. Kogler, R. Lange, J. Lapsien, T. Lenz, T. Maettig, S. Marchesini, I. Matysek, M. Ott, J. Peiffer, T. Pietsch, N. Pöhlsen, T. Rathjens, D. Sander, C. Schettler, H. Schleper, P. Schlieckau, E. Schmidt, A. Seidel, M. Sibille, J. Sola, V. Stadie, H. Steinbrück, G. Troendle, D. Usai, E. Vanelderen, L. Barth, C. Barvich, T. Baus, C. Berger, J. Boegelspacher, F. Böser, C. Butz, E. Chwalek, T. Colombo, F. De Boer, W. Descroix, A. Dierlamm, A. Eber, R. Feindt, M. Guthoff, M. Hartmann, F. Hauth, T. Heindl, S.M. Held, H. Hoffmann, K.H. Husemann, U. Katkov, I. Kornmayer, A. Kuznetsova, E. Lobelle Pardo, P. Martschei, D. Mozer, M.U. Müller, T. Niegel, M. Nürnberg, A. Oberst, O. Printz, M. Quast, G. Rabbertz, K. Ratnikov, F. Röcker, S. Schilling, F.-P. Schott, G. Simonis, H.J. Steck, P. Stober, F.M. Ulrich, R. Wagner-Kuhr, J. Wayand, S. Weiler, T. Wolf, R. Zeise, M. Anagnostou, G. Daskalakis, G. Geralis, T. Kesisoglou, S. Kyriakis, A. Loukas, D. Markou, A. Markou, C. Ntomari, E. Psallidas, A. Topsis-giotis, I. Gouskos, L. Panagiotou, A. Saoulidou, N. Stiliaris, E. Aslanoglou, X. Evangelou, I. Flouris, G. Foudas, C. Jones, J. Kokkas, P. Manthos, N. Papadopoulos, I. Paradas, E. Bencze, G. Hajdu, C. Hidas, P. Horvath, D. Sikler, F. Veszpremi, V. Vesztergombi, G. Zsigmond, A.J. Beni, N. Czellar, S. Molnar, J. Palinkas, J. Szillasi, Z. Karancsi, J. Raics, P. Trocsanyi, Z.L. Ujvari, B. Swain, S.K. Beri, S.B. Bhatnagar, V. Dhingra, N. Gupta, R. Kaur, M. Mehta, M.Z. Mittal, M. Nishu, N. Sharma, A. Singh, J.B. Kumar, A. Kumar, A. Ahuja, S. Bhardwaj, A. Choudhary, B.C. Kumar, A. Malhotra, S. Naimuddin, M. Ranjan, K. Sharma, V. Shivpuri, R.K. Banerjee, S. Bhattacharya, S. Chatterjee, K. Dutta, S. Gomber, B. Jain, S. Jain, S. Khurana, R. Modak, A. Mukherjee, S. Roy, D. Sarkar, S. Sharan, M. Singh, A.P. Abdulsalam, A. Dutta, D. Kailas, S. Kumar, V. Mohanty, A.K. Pant, L.M. Shukla, P. Topkar, A. Aziz, T. Chatterjee, R.M. Ganguly, S. Ghosh, S. Guchait, M. Gurtu, A. Kole, G. Kumar, S. Maity, M. Majumder, G. Mazumdar, K. Mohanty, G.B. Parida, B. Sudhakar, K. Wickramage, N. Banerjee, S. Dugad, S. Arfaei, H. Bakhshiansohi, H. Behnamian, H. Etesami, S.M. Fahim, A. Jafari, A. Khakzad, M. Mohammadi Najafabadi, M. Naseri, M. Paktinat Mehdiabadi, S. Safarzadeh, B. Zeinali, M. Grunewald, M. Abbrescia, M. Barbone, L. Calabria, C. Cariola, P. Chhibra, S.S. Colaleo, A. Creanza, D. De Filippis, N. De Palma, M. De Robertis, G. Fiore, L. Franco, M. Iaselli, G. Loddo, F. Maggi, G. Maggi, M. Marangelli, B. My, S. Nuzzo, S. Pacifico, N. Pompili, A. Pugliese, G. Radogna, R. Sala, G. Selvaggi, G. Silvestris, L. Singh, G. Venditti, R. Verwilligen, P. Zito, G. Abbiendi, G. Benvenuti, A.C. Bonacorsi, D. Braibant-Giacomelli, S. Brigliadori, L. Campanini, R. Capiluppi, P. Castro, A. Cavallo, F.R. Codispoti, G. Cuffiani, M. Dallavalle, G.M. Fabbri, F. Fanfani, A. Fasanella, D. Giacomelli, P. Grandi, C. Guiducci, L. Marcellini, S. Masetti, G. Meneghelli, M. Montanari, A. Navarria, F.L. Odorici, F. Perrotta, A. Primavera, F. Rossi, A.M. Rovelli, T. Siroli, G.P. Tosi, N. Travaglini, R. Albergo, S. Cappello, G. Chiorboli, M. Costa, S. Giordano, F. Potenza, R. Saizu, M.A. Scinta, M. Tricomi, A. Tuve, C. Barbagli, G. Brianzi, M. Ciaranfi, R. Ciulli, V. Civinini, C. D’Alessandro, R. Focardi, E. Gallo, E. Gonzi, S. Gori, V. Lenzi, P. Meschini, M. Paoletti, S. Scarlini, E. Sguazzoni, G. Tropiano, A. Benussi, L. Bianco, S. Fabbri, F. Piccolo, D. Fabbricatore, P. Ferretti, R. Ferro, F. Lo Vetere, M. Musenich, R. Robutti, E. Tosi, S. Benaglia, A. D’Angelo, P. Dinardo, M.E. Fiorendi, S. Gennai, S. Geros, R. Ghezzi, A. Govoni, P. Lucchini, M.T. Malvezzi, S. Manzoni, R.A. Martelli, A. Marzocchi, B. Menasce, D. Moroni, L. Paganoni, M. Pedrini, D. Ragazzi, S. Redaelli, N. Tabarelli de Fatis, T. Buontempo, S. Cavallo, N. Di Guida, S. Fabozzi, F. Iorio, A.O.M. Lista, L. Meola, S. Merola, M. Paolucci, P. Azzi, P. Bacchetta, N. Biasotto, M. Bisello, D. Branca, A. Carlin, R. Checchia, P. Dall’Osso, M. Dorigo, T. Fanzago, F. Galanti, M. Gasparini, F. Gasparini, U. Giubilato, P. Gozzelino, A. Kanishchev, K. Lacaprara, S. Lazzizzera, I. Margoni, M. Meneguzzo, A.T. Pazzini, J. Pozzobon, N. Ronchese, P. Sgaravatto, M. Simonetto, F. Torassa, E. Tosi, M. Zotto, P. Zucchetta, A. Zumerle, G. Gabusi, M. Gaioni, L. Manazza, A. Manghisoni, M. Ratti, L. Ratti, S.P. Re, V. Riccardi, C. Traversi, G. Vitulo, P. Zucca, S. Biasini, M. Bilei, G.M. Bissi, L. Checcucci, B. Ciangottini, D. Conti, E. Fanò, L. Lariccia, P. Magalotti, D. Mantovani, G. Menichelli, M. Passeri, D. Placidi, P. Romeo, F. Saha, A. Salvatore, M. Santocchia, A. Servoli, L. Spiezia, A. Androsov, K. Arezzini, S. Azzurri, P. Bagliesi, G. Basti, A. Bernardini, J. Boccali, T. Bosi, F. Broccolo, G. Calzolari, F. Castaldi, R. Ciampa, A. Ciocci, M.A. Dell’Orso, R. Fiori, F. Foà, L. Giassi, A. Grippo, M.T. Kraan, A. Ligabue, F. Lomtadze, T. Magazzu, G. Martini, L. Mazzoni, E. Messineo, A. Moggi, A. Moon, C.S. Palla, F. Raffaelli, F. Rizzi, A. Savoy-Navarro, A. Serban, A.T. Spagnolo, P. Squillacioti, P. Tenchini, R. Tonelli, G. Venturi, A. Verdini, P.G. Vernieri, C. Barone, L. Cavallari, F. Del Re, D. Diemoz, M. Grassi, M. Jorda, C. Longo, E. Margaroli, F. Meridiani, P. Micheli, F. Nourbakhsh, S. Organtini, G. Paramatti, R. Rahatlou, S. Rovelli, C. Soffi, L. Traczyk, P. Amapane, N. Arcidiacono, R. Argiro, S. Arneodo, M. Bellan, R. Biino, C. Cartiglia, N. Casasso, S. Costa, M. Degano, A. Demaria, N. Mariotti, C. Maselli, S. Migliore, E. Monaco, V. Monteil, E. Musich, M. Obertino, M.M. Ortona, G. Pacher, L. Pastrone, N. Pelliccioni, M. Potenza, A. Rivetti, A. Romero, A. Ruspa, M. Sacchi, R. Solano, A. Staiano, A. Tamponi, U. Trapani, P.P. Belforte, S. Candelise, V. Casarsa, M. Cossutti, F. Della Ricca, G. Gobbo, B. La Licata, C. Marone, M. Montanino, D. Penzo, A. Schizzi, A. Umer, T. Zanetti, A. Chang, S. Kim, T.Y. Nam, S.K. Kim, D.H. Kim, G.N. Kim, J.E. Kim, M.S. Kong, D.J. Lee, S. Oh, Y.D. Park, H. Son, D.C. Kim, J.Y. Song, S. Choi, S. Gyun, D. Hong, B. Jo, M. Kim, H. Kim, Y. Lee, K.S. Park, S.K. Roh, Y. Choi, M. Kim, J.H. Park, C. Park, I.C. Park, S. Ryu, G. Choi, Y. Choi, Y.K. Goh, J. Kwon, E. Lee, B. Lee, J. Seo, H. Yu, I. Juodagalvis, A. Komaragiri, J.R. Castilla-Valdez, H. De La Cruz-Burelo, E. Heredia-de La Cruz, I. Lopez-Fernandez, R. Martínez-Ortega, J. Sanchez-Hernandez, A. Villasenor-Cendejas, L.M. Carrillo Moreno, S. Vazquez Valencia, F. Salazar Ibarguen, H.A. Casimiro Linares, E. Morelos Pineda, A. Krofcheck, D. Butler, P.H. Doesburg, R. Reucroft, S. Ahmad, M. Asghar, M.I. Butt, J. Hoorani, H.R. Khan, W.A. Khurshid, T. Qazi, S. Shah, M.A. Shoaib, M. Bialkowska, H. Bluj, M. Boimska, B. Frueboes, T. Górski, M. Kazana, M. Nawrocki, K. Romanowska-Rybinska, K. Szleper, M. Wrochna, G. Zalewski, P. Brona, G. Bunkowski, K. Cwiok, M. Dominik, W. Doroba, K. Kalinowski, A. Konecki, M. Krolikowski, J. Misiura, M. Wolszczak, W. Bargassa, P. Beirão Da Cruz E Silva, C. Faccioli, P. Ferreira Parracho, P.G. Gallinaro, M. Nguyen, F. Rodrigues Antunes, J. Seixas, J. Varela, J. Vischia, P. Bunin, P. Gavrilenko, M. Golutvin, I. Gorbunov, I. Kamenev, A. Karjavin, V. Konoplyanikov, V. Kozlov, G. Lanev, A. Malakhov, A. Matveev, V. Moisenz, P. Palichik, V. Perelygin, V. Shmatov, S. Skatchkov, N. Smirnov, V. Zarubin, A. Golovtsov, V. Ivanov, Y. Kim, V. Levchenko, P. Murzin, V. Oreshkin, V. Smirnov, I. Sulimov, V. Uvarov, L. Vavilov, S. Vorobyev, A. Vorobyev, A. Andreev, Y. Dermenev, A. Gninenko, S. Golubev, N. Kirsanov, M. Krasnikov, N. Pashenkov, A. Tlisov, D. Toropin, A. Epshteyn, V. Gavrilov, V. Lychkovskaya, N. Popov, V. Safronov, G. Semenov, S. Spiridonov, A. Stolin, V. Vlasov, E. Zhokin, A. Andreev, V. Azarkin, M. Dremin, I. Kirakosyan, M. Leonidov, A. Mesyats, G. Rusakov, S.V. Vinogradov, A. Belyaev, A. Boos, E. Dubinin, M. Dudko, L. Ershov, A. Gribushin, A. Kaminskiy, A. Klyukhin, V. Kodolova, O. Lokhtin, I. Obraztsov, S. Petrushanko, S. Savrin, V. Azhgirey, I. Bayshev, I. Bitioukov, S. Kachanov, V. Kalinin, A. Konstantinov, D. Krychkine, V. Petrov, V. Ryutin, R. Sobol, A. Tourtchanovitch, L. Troshin, S. Tyurin, N. Uzunian, A. Volkov, A. Adzic, P. Djordjevic, M. Ekmedzic, M. Milosevic, J. Aguilar-Benitez, M. Alcaraz Maestre, J. Battilana, C. Calvo, E. Cerrada, M. Chamizo Llatas, M. Colino, N. De La Cruz, B. Delgado Peris, A. Domínguez Vázquez, D. Fernandez Bedoya, C. Fernández Ramos, J.P. Ferrando, A. Flix, J. Fouz, M.C. Garcia-Abia, P. Gonzalez Lopez, O. Goy Lopez, S. Hernandez, J.M. Josa, M.I. Merino, G. Navarro De Martino, E. Puerta Pelayo, J. Quintario Olmeda, A. Redondo, I. Romero, L. Soares, M.S. Willmott, C. Albajar, C. de Trocóniz, J.F. Missiroli, M. Brun, H. Cuevas, J. Fernandez Menendez, J. Folgueras, S. Gonzalez Caballero, I. Lloret Iglesias, L. Brochero Cifuentes, J.A. Cabrillo, I.J. Calderon, A. Duarte Campderros, J. Fernandez, M. Gomez, G. Gonzalez Sanchez, J. Graziano, A. Jaramillo Echeverria, R.W. Lopez Virto, A. Marco, J. Marco, R. Martinez Rivero, C. Matorras, F. Moya, D. Munoz Sanchez, F.J. Piedra Gomez, J. Rodrigo, T. Rodríguez-Marrero, A.Y. Ruiz-Jimeno, A. Scodellaro, L. Vila, I. Vilar Cortabitarte, R. Abbaneo, D. Ahmed, I. Albert, E. Auffray, E. Auzinger, G. Bachtis, M. Baillon, P. Ball, A.H. Barney, D. Bendavid, J. Benhabib, L. Benitez, J.F. Bernet, C. Berruti, G.M. Bianchi, G. Blanchot, G. Bloch, P. Bocci, A. Bonato, A. Bondu, O. Botta, C. Breuker, H. Camporesi, T. Ceresa, D. Cerminara, G. Christiansen, J. Christiansen, T. Chávez Niemelä, A.O. Coarasa Perez, J.A. Colafranceschi, S. D’Alfonso, M. D’Auria, A. d’Enterria, D. Dabrowski, A. Daguin, J. David, A. De Guio, F. De Roeck, A. De Visscher, S. Detraz, S. Deyrail, D. Dobson, M. Dupont- Sagorin, N. Elliott-Peisert, A. Eugster, J. Faccio, F. Felici, D. Frank, N. Franzoni, G. Funk, W. Giffels, M. Gigi, D. Gill, K. Giordano, D. Girone, M. Giunta, M. Glege, F. Gomez-Reino Garrido, R. Gowdy, S. Guida, R. Hammer, J. Hansen, M. Harris, P. Honma, A. Innocente, V. Janot, P. Kaplon, J. Karavakis, E. Katopodis, T. Kottelat, L.J. Kousouris, K. Kovács, M.I. Krajczar, K. Krzempek, L. Lecoq, P. Lourenço, C. Magini, N. Malgeri, L. Mannelli, M. Marchioro, A. Marconi, S. Marques Pinho Noite, J. 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Anastassov, A. Hahn, K.A. Kubik, A. Lusito, L. Mucia, N. Odell, N. Pollack, B. Pozdnyakov, A. Schmitt, M. Sevova, S. Stoynev, S. Sung, K. Trovato, M. Velasco, M. Won, S. Berry, D. Brinkerhoff, A. Chan, K.M. Drozdetskiy, A. Hildreth, M. Jessop, C. Karmgard, D.J. Kellams, N. Kolb, J. Lannon, K. Luo, W. Lynch, S. Marinelli, N. Morse, D.M. Pearson, T. Planer, M. Ruchti, R. Slaunwhite, J. Valls, N. Wayne, M. Wolf, M. Woodard, A. Antonelli, L. Bylsma, B. Durkin, L.S. Flowers, S. Hill, C. Hughes, R. Kotov, K. Ling, T.Y. Puigh, D. Rodenburg, M. Smith, G. Vuosalo, C. Winer, B.L. Wolfe, H. Wulsin, H.W. Berry, E. Elmer, P. Halyo, V. Hebda, P. Hegeman, J. Hunt, A. Jindal, P. Koay, S.A. Lujan, P. Marlow, D. Medvedeva, T. Mooney, M. Olsen, J. Piroué, P. Quan, X. Raval, A. Saka, H. Stickland, D. Tully, C. Werner, J.S. Zenz, S.C. Zuranski, A. Brownson, E. Lopez, A. Mendez, H. Ramirez Vargas, J.E. Alagoz, E. Arndt, K. Benedetti, D. Bolla, G. Bortoletto, D. Bubna, M. Cervantes, M. De Mattia, M. 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Sakharov, A. Sarangi, T. Savin, A. Smith, W.H.

Abstract

The central component of the CMS detector is the largest silicon tracker ever built. The precise alignment of this complex device is a formidable challenge, and only achievable with a significant extension of the technologies routinely used for tracking detectors in the past. This article describes the full-scale alignment procedure as it is used during LHC operations. Among the specific features of the method are the simultaneous determination of up to 200 000 alignment parameters with tracks, the measurement of individual sensor curvature parameters, the control of systematic misalignment effects, and the implementation of the whole procedure in a multi-processor environment for high execution speed. Overall, the achieved statistical accuracy on the module alignment is found to be significantly better than 10μm.© CERN 2014 for the benefit of the CMS collaboration..

Published
2014

36. Anisotropy-tuning by doping: phase diagram of CsNi0.98Fe0.02Cl3 measured by caloric experiments

Author

Klaus Knorr, K. Kiefer, and M. Enderle

Subjects
Magnetic anisotropy, Materials science, Condensed matter physics, Heisenberg model, Magnetism, Magnetic refrigeration, Antiferromagnetism, Condensed Matter::Strongly Correlated Electrons, Ising model, Condensed Matter Physics, Anisotropy, Electronic, Optical and Magnetic Materials, Phase diagram
Abstract

The magnetic phase diagram of the Fe 2+ doped hexagonal ABX 3 compound CsNi 0.98 Fe 0.02 Cl 3 is investigated measuring the specific heat capacity and the magnetocaloric effect. In contrast to earlier specific heat, ultrasound and NMR experiments our measurements identify transitions between three ordered phases with the field applied in the hexagonal plane. Since the pure compound, a Heisenberg antiferromagnet with weak Ising anisotropy, has only two ordered phases for this field direction, while three are predicted for weak easy-plane anisotropy, our data provide the unambiguous proof that the anisotropy of CsNiCl 3 can be effectively modeled by doping with Fe 2+ .

Published
2001
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37. Neutron Scattering Study of the Field-Induced Soliton Lattice inCuGeO3

Author

A. Revcolevschi, A. Hoser, L. P. Regnault, D. F. McMorrow, Guy Dhalenne, P. Vorderwisch, Henrik M. Rønnow, M. Enderle, Karel Prokes, and H. Schneider

Subjects
Physics, Magnetization, Amplitude, Condensed matter physics, Lattice (order), Magnetic components, General Physics and Astronomy, Field dependence, Condensed Matter::Strongly Correlated Electrons, Soliton, Neutron scattering, Critical field
Abstract

CuGeO3 undergoes a transition from a spin-Peierls phase to an incommensurate phase at a critical field of H-c approximate to 12.5 T. In the high-field phase a lattice of solitons forms, with both structural and magnetic components, and these have been studied using neutron scattering techniques. Our results provide direct evidence for a long-ranged magnetic soliton structure which has both staggered and uniform magnetizations with amplitudes that are broadly in accord with theoretical estimates. The magnetic soliton width Gamma(m) and the field dependence of the incommensurability delta k(SP) are found to agree well with theoretical predictions.

Published
2000
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38. Orientational disorder and melting ofCF2Cl2monolayers physisorbed on graphite

Author

Klaus Knorr, A. Warken, and M. Enderle

Subjects
Condensed Matter::Soft Condensed Matter, Phase transition, Molecular solid, Materials science, Condensed matter physics, Monolayer, Hexagonal phase, Molecule, Mesophase, Graphite, Entropy (order and disorder)
Abstract

We present specific heat experiments on ${\mathrm{CF}}_{2}{\mathrm{Cl}}_{2}$ monolayers physisorbed on graphite and determine the entropy changes at the structural and melting phase transitions. The results confirm previously reported x-ray studies where a phase sequence from a low-temperature commensurate hexagonal phase to an incommensurate triangular mesophase and finally the liquid phase was observed. The temperature dependence of the excess entropy reveals that the low temperature phase is orientationally ordered. Angular disorder with respect to reorientation around the surface normal evolves in the mesophase, and is fully developed just below the melting transition where the molecule starts to rotate around an axis parallel to the surface. We observe strong evidence for two-dimensional random exchange or random field behavior at the melting transition of the mesophase due to the bond disorder produced by the rotation about an axis parallel to the surface.

Published
2000
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39. Longitudinal spin fluctuations of coupled integer-spin chains: Haldane triplet dynamics in the ordered phase ofCsNiCl3

Author

M. Enderle, W. J. L. Buyers, Zin Tun, and M. Steiner

Subjects
Physics, Quantum spin Hall effect, Condensed matter physics, Spin polarization, Spin wave, Quantum critical point, Condensed Matter::Strongly Correlated Electrons, Quantum spin liquid, Triplet state, Spin quantum number, Doublet state
Abstract

By means of high-resolution polarized neutron scattering from the spin-1 chain compound ${\mathrm{CsNiCl}}_{3},$ we have observed at least one additional mode of spin fluctuations, not contained in spin-wave theory, in the three-dimensional antiferromagnetically ordered phase of the material. The number of observed modes, their polarization, frequency, magnetic field dependence, and intensity show that, in contrast to the doublet-spin dynamics of conventional antiferromagnets, the ${\mathrm{Ni}}^{2+}$ spins of ${\mathrm{CsNiCl}}_{3}$ manifest triplet fluctuations where one component is parallel to the ordered moment. The results confirm that the Ginsburg-Landau model of Affleck and Wellman gives a realistic description of the dynamics of an ordered array of coupled integer-spin chains exhibiting the Haldane gap. The longitudinal fluctuations exist because the system lies not too far from a quantum critical point.

Published
1999
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40. Ring exchange in lanthanum cuprate

Author

B. Fåk, A. M. Toader, J. P. Goff, Nic Shannon, M. Enderle, J. R. Stewart, and Michel Roger

Subjects
Physics, Sigma model, Condensed matter physics, Phase (waves), Condensed Matter Physics, Ring (chemistry), Electronic, Optical and Magnetic Materials, Paramagnetism, Condensed Matter::Strongly Correlated Electrons, Cuprate, Atomic physics, Series expansion, Absolute scale, Spin-½
Abstract

We have measured the diffuse scattering of polarized neutrons in the paramagnetic phase of La2CuO4 using the IN20 spectrometer at the Institut Laue-Langevin. The dynamical response is shown to be in full agreement with the predictions of the quantum nonlinear sigma model. The staggered susceptibilty has been placed on an absolute scale to facilitate the comparison of our data with theoretical models. New calculations of the high-temperature series expansion of the spin correlations in the paramagnetic phase provide compelling, quantitative evidence for the existence of four-particle ring exchange.

Published
2007
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41. Spin correlations in the frustrated square lattice Pb2VO(PO4)2

Author

M. Enderle, C. Geibel, M. Skoulatos, E. E. Kaul, Nsp Shannon, Andrew Wildes, J. P. Goff, and AP Murani

Subjects
Physics, Paramagnetism, Condensed matter physics, Ferromagnetism, Magnetic form factor, Antiferromagnetism, Condensed Matter::Strongly Correlated Electrons, Neutron scattering, Condensed Matter Physics, Ground state, Néel temperature, Electronic, Optical and Magnetic Materials, Spin-½
Abstract

The new frustrated square-lattice system, Pb 2 VO(PO 4 ) 2 , has been investigated using polarised neutron scattering. From these studies, made on powdered samples, we have determined the nature of the exchange interactions and the magnetic ordering for this novel quantum magnet. Quantum order from disorder occurs at low temperature, and the ground state observed below the Neel temperature T N ∼3.7 K is a collinear antiferromagnet. At room temperature there are no magnetic correlations and it is possible to model the scattering with the V 4+ magnetic form factor. However, at T ∼20 K, a temperature well into the paramagnetic phase, magnetic correlations are observed, and these spin correlations have been modelled using a high-temperature series expansion. Ferromagnetic nearest-neighbour exchange J 1 ∼−2 K and antiferromagnetic next-nearest-neighbour exchange J 2 ∼6.5 K are obtained, and this is of particular interest theoretically, since it corresponds to a new region of the J 1 – J 2 phase diagram.

Published
2007
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42. 2D Ising Critical Behavior at an Isomorphous Structural Phase Transition inC2F6Monolayers Physisorbed on Graphite

Author

Klaus Knorr, St. Faßbender, D. Arndt, and M. Enderle

Subjects
Diffraction, Crystallography, Materials science, Condensed matter physics, Monolayer, General Physics and Astronomy, Ising model, Hexagonal lattice, Graphite, Type (model theory), Renormalization group, Heat capacity
Abstract

${\mathrm{C}}_{2}{\mathrm{F}}_{6}$ monolayers physisorbed on graphite have been investigated by heat capacity and x-ray diffraction measurements. With increasing temperature, the adsorbate shows a sequence of three 2D solid phases, all of them having a triangular lattice, followed by the 2D fluid state. One of the transitions belongs to the universality class of the 2D Ising model and is of a new orientational order-disorder type.

Published
1998
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43. The phase diagram and critical behaviour of the easy-plane antiferromagnet

Author

M Steiner, Y Ajiro, M Winkelmann, R Schneider, T Asano, and M. Enderle

Subjects
Magnetization, Magnetic anisotropy, Condensed matter physics, Chemistry, Critical phenomena, Antiferromagnetism, Condensed Matter::Strongly Correlated Electrons, General Materials Science, Ising model, Multicritical point, Condensed Matter Physics, Critical exponent, Phase diagram
Abstract

Neutron diffraction measurements have been performed to determine the magnetic phase diagram of the stacked-triangular antiferromagnet between T = 1.8 K and T = 6 K in static magnetic fields up to B = 5 T applied perpendicular to the c-axis. The substitution of a few per cent of for leads to a compensation of the weak Ising anisotropy of the pure compound, and induces an XY-anisotropy in the doped system. The magnetic phase diagram displays three different magnetically ordered phases with a multicritical point at B = 2 T and T = 4.3 K. The phase diagram and the spin configurations of the different phases are found to be consistent with theoretical predictions for stacked-triangular antiferromagnets with a weak easy-plane anisotropy. The spin ordering at zero field exhibits a structure in the basal plane with inherent XY- and chiral degeneracy. We have determined the critical exponent of the sublattice magnetization to be , which is close to the theoretical value of an XY chiral antiferromagnet.

Published
1997
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44. Suppression of thermal conductivity by rattling modes in thermoelectric sodium cobaltate

Author

S. Uthayakumar, J. P. Goff, Alexey Bosak, Liam Gannon, Elena Borissenko, E. Cemal, Michel Roger, D. G. Porter, Matthias J. Gutmann, Keith Refson, Andrea Piovano, D. J. Voneshen, Michael Krisch, Moritz Hoesch, M. Enderle, Andrew T. Boothroyd, Royal Holloway [University of London] (RHUL), STFC Rutherford Appleton Laboratory (RAL), Science and Technology Facilities Council (STFC), European Synchrotron Radiation Facility (ESRF), Institut Laue-Langevin (ILL), ILL, ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​ISIS Neutron and Muon Source (ISIS), Science and Technology Facilities Council (STFC)-Science and Technology Facilities Council (STFC), DIAMOND Light source, Groupe Modélisation et Théorie (GMT), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Department of Physics [Oxford], University of Oxford [Oxford], Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, and University of Oxford

Subjects
Materials science, Sodium, chemistry.chemical_element, 02 engineering and technology, Neutron scattering, 01 natural sciences, 7. Clean energy, Ion, Condensed Matter::Materials Science, Nuclear magnetic resonance, Thermal conductivity, 0103 physical sciences, Thermoelectric effect, Physics::Atomic and Molecular Clusters, General Materials Science, 010306 general physics, [PHYS]Physics [physics], Condensed matter physics, Mechanical Engineering, General Chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Thermoelectric materials, chemistry, Mechanics of Materials, 0210 nano-technology
Abstract

International audience; The need for both high electrical conductivity and low thermal conductivity creates a design conflict for thermoelectric systems, leading to the consideration of materials with complicated crystal structures1. Rattling of ions in cages results in low thermal conductivity2, 3, 4, 5, but understanding the mechanism through studies of the phonon dispersion using momentum-resolved spectroscopy is made difficult by the complexity of the unit cells6. We have performed inelastic X-ray and neutron scattering experiments that are in remarkable agreement with our first-principles density-functional calculations of the phonon dispersion for thermoelectric Na0.8CoO2, which has a large-period superstructure7. We have directly observed an Einstein-like rattling mode at low energy, involving large anharmonic displacements of the sodium ions inside multi-vacancy clusters. These rattling modes suppress the thermal conductivity by a factor of six compared with vacancy-free NaCoO2. Our results will guide the design of the next generation of materials for applications in solid-state refrigerators and power recovery.

Published
2013
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45. Absorption Model of Hydrogenic Atoms and Ions by Metal Surfaces

Author

Anna M. Popova, H. Neumann, M. Enderle, O. Melsheimer, O.S. Erkovitch, and V.V. Komarov

Subjects
Metal, Hydrogen-like atom, Materials science, visual_art, visual_art.visual_art_medium, General Physics and Astronomy, Physical and Theoretical Chemistry, Atomic physics, Absorption (electromagnetic radiation), Molecular physics, Mathematical Physics, Ion
Abstract

A model of the interaction of thermal atoms and ions with metal surfaces is presented. The model is based on the multi-particle density functional method. This method is applied to describe first the properties of the electron gas on the metal surface and second to analyze the effective potential of the Hydrogenium atom in the vicinity of the metal surface.

Published
1995
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46. Growth of highly oriented deuterium crystals in silicon nanochannels

Author

M. Enderle, Dirk Wallacher, Tommy Hofmann, and Pushpendra Kumar

Subjects
Condensed Matter::Materials Science, Crystallography, Materials science, Nanocrystal, Deuterium, Silicon, chemistry, Phase (matter), Neutron diffraction, General Physics and Astronomy, chemistry.chemical_element, Crystalline silicon, Neutron scattering
Abstract

The structure of solid deuterium confined in 9 nm wide tubular silicon nanochannels has been studied by means of elastic neutron scattering techniques. As a result we report the formation of fcc ${\mathrm{D}}_{2}$ as the stable solid phase in confinement in contrast to the hcp bulk structure. Further, a preferred alignment of ${\mathrm{D}}_{2}$ nanocrystals with respect to the surrounding crystalline silicon matrix is discussed in terms of heteroepitaxial growth of solid ${\mathrm{D}}_{2}$ on crystalline pore walls.

Published
2012

47. Evidence of a bond-nematic phase in LiCuVO4

Author

M. Enderle, Andrey Prokofiev, A. Schneidewind, Arno Hiess, Martin Mourigal, R. K. Kremer, B. Fåk, and Joseph M. Law

Subjects
Quantum phase transition, Physics, Phase transition, Condensed Matter - Materials Science, Condensed matter physics, Strongly Correlated Electrons (cond-mat.str-el), General Physics and Astronomy, Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences, Neutron scattering, Condensed Matter - Soft Condensed Matter, Magnetic field, Dipole, Condensed Matter - Strongly Correlated Electrons, Ferromagnetism, Liquid crystal, Soft Condensed Matter (cond-mat.soft), Ground state
Abstract

Polarized and unpolarized neutron scattering experiments on the frustrated ferromagnetic spin-1/2 chain LiCuVO4 show that the phase transition at HQ of 8 Tesla is driven by quadrupolar fluctuations and that dipolar correlations are short-range with moments parallel to the applied magnetic field in the high-field phase. Heat-capacity measurements evidence a phase transition into this high-field phase, with an anomaly clearly different from that at low magnetic fields. Our experimental data are consistent with a picture where the ground state above HQ has a next-nearest neighbour bond-nematic order along the chains with a fluid-like coherence between weakly coupled chains., Comment: 5 pages, 4 figures. To appear in Phys. Rev. Lett

Published
2012
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48. Embedding of the classical into the quantum description of photons

Author

Holger Neumann and M. Enderle

Subjects
Quantum technology, Open quantum system, Quantum network, Classical mechanics, Quantum state, Quantum dynamics, Quantum process, Quantum mechanics, General Physics and Astronomy, Quantum simulator, Quantum algorithm, Mathematics
Abstract

The macroscopic properties of a many-particle quantum system are revealed by an embedding of the macroscopic classical into the microscopic quantum description of the system. Such an embedding is based on the assumption that the experiments to which the classical theory applies may also be described quantum mechanically. It results from the existence of an injective trajectory observable. For photon quantum systems with a finite number of modes an embedding is explicitly constructed using the well- known phase space observable for quantum systems of finite degrees of freedom. For the general case of photon quantum fields the existence of a phase space observable is shown which, restricted to a finite number of modes, coincides with the mentioned one.

Published
1994
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49. Chiral universality in CsMnI3and CsNiCl3

Author

G Furtuna, M Enderle, and M Steiner

Subjects
Phase transition, Condensed matter physics, Chemistry, Heisenberg model, Multicritical point, Condensed Matter Physics, Classical XY model, Magnetization, symbols.namesake, Paramagnetism, Faraday effect, symbols, Condensed Matter::Strongly Correlated Electrons, General Materials Science, Critical exponent
Abstract

CsMnI3 and CsNiCl3 are hexagonal Heisenberg antiferromagnets with small Ising-like anisotropy. The magnetic specific heat of CsNiCl3, measured by linear magnetic birefringence (LMB), follows chiral XY behaviour at the phase transition between the paramagnetic and spin-flop phase up to 14.5 T, and Heisenberg behaviour close to the multicritical point. The magnetization discontinuity of CsMnI3 at the spin-flop transition was investigated by Faraday rotation. Its temperature dependence is consistent with the prediction for the chiral Heisenberg universality class.

Published
1994
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50. Spin Dynamics of the Half-Integer-Spin Quasi-One-Dimensional Heisenberg Antiferromagnet CsMnI3

Author

Kazuhisa Kakurai, Michael Steiner, Toshiya Inami, M. Enderle, and Hidekazu Tanaka

Subjects
Physics, Condensed matter physics, Spin wave, Heisenberg model, General Physics and Astronomy, Antiferromagnetism, Condensed Matter::Strongly Correlated Electrons, Half-integer, Inelastic scattering, Neutron scattering, Inelastic neutron scattering, Spin-½
Abstract

Magnetic excitations of CsMnI 3 , a quasi-one-dimensional Heisenberg antiferromagnet with S =5/2, have been measured by means of inelastic neutron scattering. Magnetic excitations in the low temperature phase are in good agreement with the predictions of the conventional linear spin-wave theory. In particular, in accordance with the linear spin-wave theory, we found three separate modes at Q =(0, 0, 1) instead of a threefold degenerate mode as seen in CsNiCl 3 ( S =1). It confirms that the spin dynamics of the integer spin value system are very different from those of the half-integer spin value system, even in their three-dimensionally ordered phase. Magnetic excitations in the intermediate phase have been also studied and it is found that the excitations were similar to those in the low temperature phase, except some overdamped intensities at certain reciprocal points. These intensities can be associated to the slow rotational motions of the spins around the c -axis.

Published
1994
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