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1. Electronic structure of vicinal surfaces tudied by ARPES: case of InAs(111)

Author

Hricovini, Karol, Richter, Maria, Heckmann, Olivier, Mariot, Jean-Michel, Sadowski, Janusz, Balasubramanian, Thiagarajan, Leandersson, Mats, Polley, Craig, Nicolaï, Laurent, Laboratoire de Physique des Matériaux et des Surfaces (LPMS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-CY Cergy Paris Université (CY), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Dynamique et Interactions en phase Condensée (DICO), 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-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), 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), Laboratoire de Chimie Physique - Matière et Rayonnement (LCPMR), Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Linneaus University, Polish Academy of Sciences (PAN), MAX IV Lab, Fotongatan 2, S-22594 Lund, Sweden, New Technologies Research Centre [Plzeň] (NTC), University of West Bohemia [Plzeň ], J. Vajda, I. Jamnický, and P. Novák, and Mariot, J.-M.

Subjects
[PHYS]Physics [physics], [PHYS] Physics [physics]
Abstract

International audience; Atomic staircases are among the simplest lateral nanostructures. In particular, electrons belonging to Shockley states of (111)-oriented noble metal surfaces are excellent test systems to explore the basic electronic properties in onedimensional superlattices by means of angular photoemission (ARPES) . These surfaces are characterized by strong emissions from free-electron-like surface states that scatter at step edges.The scattering of electrons at surface defects, such as atomic and molecular adsorbates and monatomic steps, has been made widely popular by scanning tunnelling microscopy (STM) . Observed interference patterns mirror fundamental properties of solid crystals related to electron transport and quantum confinement, such as the inelastic lifetime and quantum coherence of a scattered electron. However, even at noble metal surfaces, considered as model systems, the nature of the step potential is more complex and fundamental questions remain open . InAs(111) A and B surfaces are known to support a two-dimensional electron gas (2DEG) exhibiting a multitude of fundamental physical phenomena that can be of major importance for technological applications. The 2DEG, observed for the first time by Olsson et al. is related to the charge accumulation layer induced by band bending. We have investigated by ARPES the electronic structure of the InAs(111) prepared by molecular beam epitaxy (MBE). On InAs(111)-B we obtained a large splitting in the 2DEG than cannot be explained by the Rashba or Dresselhaus effects. STM images on the MBE prepared surface show array of equally spaced, monatomic, parallel steps. So, the 2DEG splitting can be attributed to the superlattice band folding depending on the step lattice constant

Published
2022

2. Band dispersion within pristine InBi crystal

Author

Nicolaï, L, Minár, J, Richter, M, Heckmann, O, Fanciulli, M, Reddy, L, Bell, G, Haria, R, Mariot, J.-M, Hricovini, K, Mariot, J.-M., New Technologies Research Centre [Plzeň] (NTC), University of West Bohemia [Plzeň ], Laboratoire de Physique des Matériaux et des Surfaces (LPMS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-CY Cergy Paris Université (CY), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Dynamique et Interactions en phase Condensée (DICO), 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-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), 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), University of Warwick [Coventry], Laboratoire de Chimie Physique - Matière et Rayonnement (LCPMR), Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), and J. Vajda, I. Jamnický, and P. Novák

Subjects
[PHYS]Physics [physics], [PHYS] Physics [physics]
Abstract

International audience; InBi has been theoretically analysed for many years as a semi-metal showing a stable phase within the PbO structure thanks to spin-orbit coupling forces . Regrettably, this alloy system remains not well-known on the experimental side: reports of grown ordered crystals are rare. We here present a thorough experimental and ab initio theoretical analysis on InBi(001). The crystal was grown using the Bridgman-Stockbarger technique. InBi consists of In layers sandwiched between Bi monolayers, with weak Van der Waals bonds amid the resulting trilayers. The InBi crystal was cleaved in situ in order to obtain a clean and flat surface suitable for angleresolved photoemission measurements. The SPR-KKR package , based on the Dirac equation, which fundamentally includes relativistic effects, was used for the theoretical analysis and clearly underlines the influence of the surface termination.

Published
2022

3. Triple-Point Fermions in Ferroelectric GeTe

Author

Milan Radovic, Ondřej Caha, J. Hugo Dil, Houke Chen, Laurent Nicolaï, J. Krempaský, Gunther Springholz, Martin Gmitra, E. B. Guedes, J. Minár, Mauro Fanciulli, Marco Caputo, Valentine V. Volobuev, Paul Scherrer Institute (PSI), New Technologies Research Centre [Plzeň] (NTC), University of West Bohemia [Plzeň ], Institute of Physics P. J. Šafárik University in Košice, Department of Physics, Tsinghua University (TSINGHUA UNIV.), Tsinghua University [Beijing] (THU), Laboratoire de Physique des Matériaux et des Surfaces (LPMS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-CY Cergy Paris Université (CY), Physikalisches Institut [Würzburg], Julius-Maximilians-Universität Würzburg (JMU), Johannes Kepler Universität Linz - Johannes Kepler University Linz [Autriche] (JKU), Masaryk University [Brno] (MUNI), Johannes Kepler Universität Linz (JKU), and Ecole Polytechnique Fédérale de Lausanne (EPFL)

Subjects
Physics, Condensed Matter - Materials Science, Condensed matter physics, Triple point, Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences, General Physics and Astronomy, Fermion, Lorentz covariance, 01 natural sciences, Symmetry (physics), Condensed Matter - Other Condensed Matter, Brillouin zone, 0103 physical sciences, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Condensed Matter::Strongly Correlated Electrons, Density functional theory, 010306 general physics, Electronic band structure, Other Condensed Matter (cond-mat.other), Spin-½
Abstract

Ferroelectric GeTe is unveiled to exhibit an intriguing multiple non-trivial topology of the electronic band structure due to the existence of triple-point and type-II Weyl fermions, which goes well beyond the giant Rashba spin splitting controlled by external fields as previously reported. Using spin- and angle-resolved photoemission spectroscopy combined with ab initio density functional theory, the unique spin texture around the triple point caused by the crossing of one spin degenerate and two spin-split bands along the ferroelectric crystal axis is derived. This consistently reveals spin winding numbers that are coupled with time reversal symmetry and Lorentz invariance, which are found to be equal for both triple-point pairs in the Brillouin zone. The rich manifold of effects opens up promising perspectives for studying non-trivial phenomena and multi-component fermions in condensed matter systems., 5 pages, 5 figures

Published
2020
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4. SciPy 1.0: fundamental algorithms for scientific computing in Python: 24 February 2020 : An amendment to this paper has been published and can be accessed via a link at the top of the paper

Author

Virtanen, P., Gommers, R., Oliphant, T.E., Haberland, M., Reddy, T., Cournapeau, D., Burovski, E., Peterson, P., Weckesser, W., Bright, J., Walt, S.J., Brett, M., Wilson, J., Millman, K.J., Mayorov, N., Nelson, A.R.J., Jones, E., Kern, R., Larson, E., Carey, C.J., Polat, I., Feng, Y., Moore, E.W., VanderPlas, J., Laxalde, D., Perktold, J., Cimrman, R., Henriksen, I., Quintero, E.A., Harris, C.R., Archibald, A.M., Ribeiro, A.H., Pedregosa, F., Mulbregt, P., Vijaykumar, A., Bardelli, A.P., Rothberg, A., Hilboll, A., Kloeckner, A., Scopatz, A., Lee, A., Rokem, A., Woods, C.N., Fulton, C., Masson, C., Häggström, C., Fitzgerald, C., Nicholson, D.A., Hagen, D.R., Pasechnik, D.V., Olivetti, E., Martin, E., Wieser, E., Lenders, F., Silva, Fabrice, Wilhelm, F., Young, G., Price, G.A., Ingold, G.-L., Allen, G.E., Lee, G.R., Audren, H., Probst, Irvin, Dietrich, J.P., Silterra, J., Webber, J.T., Slavič, J., Nothman, J., Buchner, J., Kulick, J., Schönberger, J.L., Miranda Cardoso, J.V., Reimer, J., Harrington, J., Rodríguez, J.L.C., Nunez-Iglesias, J., Kuczynski, J., Tritz, K., Thoma, M., Newville, M., Kümmerer, M., Bolingbroke, M., Tartre, M., Pak, M., Smith, N.J., Nowaczyk, N., Shebanov, N., Pavlyk, O., Brodtkorb, P.A., Lee, P., McGibbon, R.T., Feldbauer, R., Lewis, S., Tygier, S., Sievert, S., Vigna, S., Peterson, S., More, S., Pudlik, T., Oshima, T., Pingel, T.J., Robitaille, T.P., Spura, T., Jones, T.R., Cera, T., Leslie, T., Zito, T., Krauss, T., Upadhyay, U., Halchenko, Y.O., Vázquez-Baeza, Y., SciPy 1.0, Contributors, Low Temperature Laboratory, TKK Helsinki University of Technology (TKK), Centre Interdisciplinaire de Nanoscience de Marseille (CINaM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Tribologie et Dynamique des Systèmes (LTDS), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Ecole Nationale d'Ingénieurs de Saint Etienne-Centre National de la Recherche Scientifique (CNRS), SNECMA Villaroche [Moissy-Cramayel], Safran Group, New Technologies Research Centre [Plzeň] (NTC), University of West Bohemia [Plzeň ], Institute of Environmental Physics [Bremen] (IUP), University of Bremen, Istituto Nazionale di Ricerca Metrologica (INRiM), Laboratoire Chrono-environnement - CNRS - UBFC (UMR 6249) (LCE), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Laboratoire de Mécanique et d'Acoustique [Marseille] (LMA ), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Sons, Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), European Synchrotron Radiation Facility (ESRF), Lab-STICC_ENSTAB_CID_PRASYS, Laboratoire des sciences et techniques de l'information, de la communication et de la connaissance (Lab-STICC), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT), Max Planck Institute for Solar System Research (MPS), Max-Planck-Gesellschaft, University of Chicago, Consortium of Advanced Radiation Sciences, Advanced Photon Source, GSECARS, University of Chicago, Laboratoire de physique des gaz et des plasmas (LPGP), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), The Open University [Milton Keynes] (OU), Nobeyama Radio Observatory, Gommers, Ralf [0000-0002-0300-3333], Haberland, Matt [0000-0003-4806-3601], Reddy, Tyler [0000-0003-2364-6157], van der Walt, Stéfan J. [0000-0001-9276-1891], Millman, K. Jarrod [0000-0002-5263-5070], Nelson, Andrew R. J. [0000-0002-4548-3558], Laxalde, Denis [0000-0002-5540-4825], Ribeiro, Antônio H. [0000-0003-3632-8529], van Mulbregt, Paul [0000-0002-2382-8308], Apollo - University of Cambridge Repository, van der Walt, Stéfan J [0000-0001-9276-1891], Millman, K Jarrod [0000-0002-5263-5070], Nelson, Andrew RJ [0000-0002-4548-3558], Ribeiro, Antônio H [0000-0003-3632-8529], Quansight LLC, California Polytechnic State University [San Luis Obispo] (CAL POLY), Los Alamos National Laboratory (LANL), AUTRES, National Research University Higher School of Economics [St. Petersburg], Tallinn Technical University, University of California [Berkeley] (UC Berkeley), University of California (UC), University of Birmingham [Birmingham], Skolkovo Innovation Center, Australian Nuclear Science and Technology Organisation [Australie] (ANSTO), Enthought Inc, University of Washington [Seattle], University of Massachusetts [Amherst] (UMass Amherst), University of Massachusetts System (UMASS), Bruker BioSpin Corporation, Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Ecole Nationale d'Ingénieurs de Saint Etienne (ENISE)-Centre National de la Recherche Scientifique (CNRS), University of Texas at Austin [Austin], Astronomical Institute Anton Pannekoek (AI PANNEKOEK), University of Amsterdam [Amsterdam] (UvA), Universidade Federal de Minas Gerais [Belo Horizonte] (UFMG), Google LLC, Laboratoire Chrono-environnement (UMR 6249) (LCE), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Université Bretagne Loire (UBL)-IMT Atlantique (IMT Atlantique), and Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research (MPS)

Subjects
FOS: Computer and information sciences, Computer science, 01 natural sciences, Biochemistry, Computer Science - Software Engineering, 631/45/56, Data Structures and Algorithms (cs.DS), 010303 astronomy & astrophysics, computer.programming_language, 0303 health sciences, Signal processing, Signal Processing, Computer-Assisted, Computational Physics (physics.comp-ph), ddc, Linear algebra, Perspective, Minification, Physics - Computational Physics, Algorithm, Algorithms, Biotechnology, De facto standard, FOS: Physical sciences, Image processing, History, 21st Century, Models, Biological, 706/703/559, Python (Computer program language), Computational science, 03 medical and health sciences, Computer Science - Data Structures and Algorithms, 0103 physical sciences, Computer Simulation, [INFO]Computer Science [cs], ddc:530, Cluster analysis, Molecular Biology, Scientific computing, 030304 developmental biology, Sparse matrix, software, Computational Biology, Cell Biology, Python (programming language), History, 20th Century, [INFO.INFO-NA]Computer Science [cs]/Numerical Analysis [cs.NA], Software Engineering (cs.SE), Nonlinear Dynamics, Linear Models, Computer Science - Mathematical Software, Programming Languages, 631/114, computer, Mathematical Software (cs.MS), Python
Abstract

SciPy is an open source scientific computing library for the Python programming language. SciPy 1.0 was released in late 2017, about 16 years after the original version 0.1 release. SciPy has become a de facto standard for leveraging scientific algorithms in the Python programming language, with more than 600 unique code contributors, thousands of dependent packages, over 100,000 dependent repositories, and millions of downloads per year. This includes usage of SciPy in almost half of all machine learning projects on GitHub, and usage by high profile projects including LIGO gravitational wave analysis and creation of the first-ever image of a black hole (M87). The library includes functionality spanning clustering, Fourier transforms, integration, interpolation, file I/O, linear algebra, image processing, orthogonal distance regression, minimization algorithms, signal processing, sparse matrix handling, computational geometry, and statistics. In this work, we provide an overview of the capabilities and development practices of the SciPy library and highlight some recent technical developments., Comment: Article source data is available here: https://github.com/scipy/scipy-articles

Published
2020
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5. Bi ultra-thin crystalline films on InAs(1 1 1) A and B substrates: a combined core-level and valence-band angle-resolved and dichroic photoemission study

Author

J-M Mariot, Thiagarajan Balasubramanian, Janusz Kanski, Uros Djukic, M. Leandersson, O. Heckmann, Juergen Braun, Jun Fujii, Ivana Vobornik, Hubert Ebert, Maria Christine Richter, Karol Hricovini, Jan Minár, Laurent Nicolaï, Janusz Sadowski, Weimin Wang, New Technologies Research Centre [Plzeň] (NTC), University of West Bohemia [Plzeň ], Laboratoire de Chimie Physique - Matière et Rayonnement (LCPMR), Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des Matériaux et des Surfaces (LPMS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-CY Cergy Paris Université (CY), MAX IV Lab, Fotongatan 2, S-22594 Lund, Sweden, Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Dynamique et Interactions en phase Condensée (DICO), 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-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), 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), Chalmers University of Technology [Gothenburg, Sweden], Department of Physics and Electrical Engineering, Linnaeus University, SE-391 82, Kalmar, Institute of Physics, Polish Academy of Sciences, Polska Akademia Nauk = Polish Academy of Sciences (PAN), Faculty of Physics, Warsaw University of Technology, Warsaw University of Technology [Warsaw], Department Chemie der Ludwigs-Maximilians-Universität, 81377 München, Germany, CNR Istituto Officina dei Materiali (IOM), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Elettra Sincrotrone, CNR-IMIP & INFM-TASC, Deutsche Forschungsgemeinschaft SPP1666 priority program (Grants No. EB144/26 and EB154/32), Computational and Experimental Design of Advanced Materials with New Functionalities (CZ.02.1.01/0.0/0.0/15_003/0000358), Institute of Physics Publishing Ltd, ANR-11-EQPX-0034,PATRIMEX,PATrimoines matériels : Réseau d'Instrumentation Multisites Expérimental(2011), and European Project: 312284,EC:FP7:INFRA,FP7-INFRASTRUCTURES-2012-1,CALIPSO(2012)

Subjects
ultra-thin films, growth, electronic structure calculations, General Physics and Astronomy, Synchrotron radiation, bismuth indium arsenide growth ultra-thin films angle-resolved photoemission electronic structure calculations circular dichroism, Electronic structure, Epitaxy, Dichroic glass, indium arsenide, 01 natural sciences, Molecular physics, angle-resolved photoemission, 010305 fluids & plasmas, symbols.namesake, X-ray photoelectron spectroscopy, 0103 physical sciences, bismuth, [CHIM]Chemical Sciences, 010306 general physics, Physics, [PHYS]Physics [physics], Fermi level, circular dichroism, Brillouin zone, Electron diffraction, symbols
Abstract

The growth of Bi on both the In-terminated (A) face and the As-terminated (B) face of InAs(1 1 1) has been investigated by low-energy electron diffraction, scanning tunnelling microscopy, and photoelectron spectroscopy using synchrotron radiation. The changes upon Bi deposition of the In 4d and Bi 5d 5/2 photoelectron signals allow to get a comprehensive picture of the Bi/InAs(1 1 1) interface. From the early stage the Bi growth on the A face is epitaxial, contrary to that on the B face that proceeds via the formation of islands. Angle-resolved photoelectron spectra show that the electronic structure of a Bi deposit of ≈10 bi-layers on the A face is identical to that of bulk Bi, while more than ≈30 bi-layers are needed for the B face. Both bulk and surface electronic states observed are well accounted for by fully relativistic ab initio calculations performed using the one-step model of photoemission. These calculations are used to analyse the dichroic photoemission data recorded in the vicinity of the Fermi level around the Γ ¯ point of the Brillouin zone.

Published
2019
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6. Quasi 1D structures at the Bi/InAs(100) surface

Author

Maria Christine Richter, Uros Djukic, O. Heckmann, Laurent Nicolaï, J.-M. Mariot, Karol Hricovini, Weimin Wang, Ivana Vobornik, Laboratoire de Physique des Matériaux et des Surfaces (LPMS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-CY Cergy Paris Université (CY), Laboratoire de Chimie Physique - Matière et Rayonnement (LCPMR), Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), New Technologies Research Centre [Plzeň] (NTC), University of West Bohemia [Plzeň ], Elettra Sincrotrone, CNR-IMIP & INFM-TASC, Department of Physics, Chemistry and Biology, Linköping University, American Institute of Physics, and European Project: 312284,EC:FP7:INFRA,FP7-INFRASTRUCTURES-2012-1,CALIPSO(2012)

Subjects
[PHYS]Physics [physics], Materials science, Spintronics, Condensed matter physics, Photoemission spectroscopy, Fermi level, chemistry.chemical_element, Scanning tunneling microscopy | Gallium arsenide | electron diffraction, Electronic structure, Photon energy, Bismuth, symbols.namesake, Condensed Matter::Materials Science, chemistry, Topological insulator, symbols, Electronic band structure
Abstract

APCOM2018 - 24th International conference Applied Physics of Condensed Matter, Štrbské Pleso, Slovaquie, 20 to 22/06/2018"Solid State Physics and Radioactive Irradiation"; International audience; Thin Bi films are interesting candidates for spintronic applications due to a large spin-orbit splitting that, combined with the loss of inversion symmetry at the surface, results in a band structure that is not spin-degenerate. In recent years, applications for topological insulators based on Bi and Bi alloys have as well attracted much attention. Here we present angle-resolved photoemission spectroscopy studies of the Bi/InAs(100) interface. Bismuth deposition followed by annealing of the surface results in the formation of one full Bi monolayer decorated by Bi nanolines. We found that the building up of the interface does not affect the electronic structure of the substrate. As a consequence of weak interaction, Bi states are placed in the gaps of the electronic structure of InAs(100). We observe a strong resonance of the Bi electronic states close to the Fermi level; its intensity depends on the photon energy and the photon polarization. These states show nearly no dispersion when measured perpendicular to the nanolines, confirming their onedimensionality.

Published
2018
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7. SymPy: symbolic computing in Python

Author

Matthew Rocklin, Sumith Kulal, Richard P. Muller, Brian E. Granger, Amit Kumar, Andy R. Terrel, Ashutosh Saboo, Aaron Meurer, Thilina Rathnayake, Jason K. Moore, Mateusz Paprocki, Štěpán Roučka, Isuru Dilanka Fernando, Shivam Vats, Ondřej Čertík, Robert Cimrman, Anthony Scopatz, Sartaj Singh, Christopher Smith, Sergey B Kirpichev, Sergiu Ivanov, Matthew Curry, Fredrik Johansson, Francesco Bonazzi, Fabian Pedregosa, Harsh Gupta, Sean Vig, Department of Mechanical Engineering [Columbia], College of Engineering and Computing [Columbia], University of South Carolina [Columbia]-University of South Carolina [Columbia], Polar Semiconductor, LLC [Bloomington], Continuum Analytics [Austin], Los Alamos National Laboratory (LANL), Faculty of Physics [MSU, Moscow], Lomonosov Moscow State University (MSU), Department of Applied Mathematics [New Delhi], Delhi Technological University [New Delhi], Laboratoire d'Algorithmique Complexité et Logique (LACL), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Department of Mechanical and Aerospace Engineering [Univ California Davis] (MAE - UC Davis), University of California [Davis] (UC Davis), University of California (UC)-University of California (UC), Department of Mathematical Sciences [Varanasi], Banaras Hindu University [Varanasi] (BHU), Department of Computer Science and Engineering [Moratuwa], University of Moratuwa [Moratuwa], University of Illinois at Urbana-Champaign [Urbana], University of Illinois System, California Polytechnic State University [San Luis Obispo] (CAL POLY), Sandia National Laboratories [Albuquerque] (SNL), Sandia National Laboratories - Corporation, Department of Theory and Bio-Systems [Potsdam], Max Planck Institute of Colloids and Interfaces, Max-Planck-Gesellschaft-Max-Planck-Gesellschaft, Indian Institute of Technology Kharagpur (IIT Kharagpur), Lithe and fast algorithmic number theory (LFANT), Institut de Mathématiques de Bordeaux (IMB), Université Bordeaux Segalen - Bordeaux 2-Université Sciences et Technologies - Bordeaux 1-Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux (Bordeaux INP)-Centre National de la Recherche Scientifique (CNRS)-Université Bordeaux Segalen - Bordeaux 2-Université Sciences et Technologies - Bordeaux 1-Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux (Bordeaux INP)-Centre National de la Recherche Scientifique (CNRS)-Inria Bordeaux - Sud-Ouest, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), Statistical Machine Learning and Parsimony (SIERRA), Département d'informatique - ENS Paris (DI-ENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Inria de Paris, Institut National de Recherche en Informatique et en Automatique (Inria), Department of Physics and Astronomy [Albuquerque], The University of New Mexico [Albuquerque], Center for Quantum Information and Control [Albuquerque] (CQuIC), Fashion Metric [Austin], NUMFOCUS [Austin], Department of Surface and Plasma Science [Prague], Faculty of Mathematics and Physics [Praha/Prague], Charles University [Prague] (CU)-Charles University [Prague] (CU), Birla Institute of Technology and Science (BITS Pilani), Indian Institute of Technology Bombay (IIT Bombay), New Technologies Research Centre [Plzeň] (NTC), University of West Bohemia [Plzeň ], Université Paris-Est (UPE), Department of Mechanical and Aerospace Engineering [Davis], University of California-University of California, Département d'informatique de l'École normale supérieure (DI-ENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), University of Moratuwa, Université Bordeaux Segalen - Bordeaux 2-Université Sciences et Technologies - Bordeaux 1 (UB)-Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux (Bordeaux INP)-Centre National de la Recherche Scientifique (CNRS)-Université Bordeaux Segalen - Bordeaux 2-Université Sciences et Technologies - Bordeaux 1 (UB)-Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux (Bordeaux INP)-Centre National de la Recherche Scientifique (CNRS)-Inria Bordeaux - Sud-Ouest, Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche en Informatique et en Automatique (Inria)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche en Informatique et en Automatique (Inria)-École normale supérieure - Paris (ENS Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Inria de Paris

Subjects
0301 basic medicine, Theoretical computer science, General Computer Science, Computer science, [PHYS.MPHY]Physics [physics]/Mathematical Physics [math-ph], Symbolic computing, computer.software_genre, 01 natural sciences, Extensibility, lcsh:QA75.5-76.95, 03 medical and health sciences, [INFO.INFO-LG]Computer Science [cs]/Machine Learning [cs.LG], 0103 physical sciences, [INFO]Computer Science [cs], Symbolics, Python, počítačový algebraický systém, symbolické výpočty, Architecture, 010303 astronomy & astrophysics, computer.programming_language, Programming language, business.industry, Usability, Python (programming language), Symbolic computation, 030104 developmental biology, Open source, Computer algebra system, lcsh:Electronic computers. Computer science, business, computer, Python
Abstract

Článek pojednává o architektuře SymPy, popisuje vlastnosti tohoto softwaru a vybrané pod-moduly. SymPy is an open source computer algebra system written in pure Python. It is built with a focus on extensibility and ease of use, through both interactive and programmatic applications. These characteristics have led SymPy to become a popular symbolic library for the scientific Python ecosystem. This paper presents the architecture of SymPy, a description of its features, and a discussion of select submodules. The supplementary material provide additional examples and further outline details of the architecture and features of SymPy.

Published
2017
Full Text
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8. Scipy Lecture Notes

Author

Varoquaux, Gaël, Gouillart, Emmanuelle, Vahtras, Olav, Haenel, Valentin, Rougier, Nicolas P., Gommers, Ralf, Pedregosa, Fabian, Jędrzejewski-Szmek, Zbigniew, Virtanen, Pauli, Combelles, Christophe, Pinte, Didrik, Cimrman, Robert, Espaze, André, Chauve, Adrien, Burns, Christopher, Modelling brain structure, function and variability based on high-field MRI data (PARIETAL), Inria Saclay - Ile de France, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Service NEUROSPIN (NEUROSPIN), 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 Paris-Saclay-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 Paris-Saclay, Surface du Verre et Interfaces (SVI), Centre National de la Recherche Scientifique (CNRS), Royal Institute of Technology [Stockholm] (KTH ), Chercheur indépendant, Institut des Maladies Neurodégénératives [Bordeaux] (IMN), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), Mnemonic Synergy (Mnemosyne), Laboratoire Bordelais de Recherche en Informatique (LaBRI), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Électronique, Informatique et Radiocommunications de Bordeaux (ENSEIRB)-Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Électronique, Informatique et Radiocommunications de Bordeaux (ENSEIRB)-Inria Bordeaux - Sud-Ouest, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Institut des Maladies Neurodégénératives [Bordeaux] (IMN), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Université de Bordeaux (UB), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Électronique, Informatique et Radiocommunications de Bordeaux (ENSEIRB), ASML [VELDHOVEN] (ASML), ASML Netherlands B.V., Statistical Machine Learning and Parsimony (SIERRA), Département d'informatique de l'École normale supérieure (DI-ENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-Inria Paris-Rocquencourt, Institut National de Recherche en Informatique et en Automatique (Inria), George Mason University [Fairfax], Aalto University, anybox, Enthought Inc, New Technologies Research Centre [Plzeň] (NTC), University of West Bohemia [Plzeň ], Pythonian, Serenytics, and Eventbrite

Subjects
scientific computing, [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], Scipy, scientific Python, [INFO]Computer Science [cs]
Abstract

International audience; Tutorials on the scientific Python ecosystem: a quick introduction to central tools and techniques. The different chapters each correspond to a 1 to 2 hours course with increasing level of expertise, from beginner to expert.

Published
2015
Full Text
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9. Scipy Lecture Notes

Author

Varoquaux, Gaël, Gouillart, Emmanuelle, Vahtras, Olav, Haenel, Valentin, Rougier, Nicolas P., Gommers, Ralf, Pedregosa, Fabian, Jędrzejewski-Szmek, Zbigniew, Virtanen, Pauli, Combelles, Christophe, Pinte, Didrik, Cimrman, Robert, Espaze, André, Chauve, Adrien, Burns, Christopher, Modelling brain structure, function and variability based on high-field MRI data (PARIETAL), Service NEUROSPIN (NEUROSPIN), Université Paris-Saclay-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 Paris-Saclay-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)-Inria Saclay - Ile de France, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), Surface du Verre et Interfaces (SVI), Centre National de la Recherche Scientifique (CNRS), Royal Institute of Technology [Stockholm] (KTH ), Chercheur indépendant, Institut des Maladies Neurodégénératives [Bordeaux] (IMN), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), Mnemonic Synergy (Mnemosyne), Laboratoire Bordelais de Recherche en Informatique (LaBRI), Université de Bordeaux (UB)-École Nationale Supérieure d'Électronique, Informatique et Radiocommunications de Bordeaux (ENSEIRB)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-École Nationale Supérieure d'Électronique, Informatique et Radiocommunications de Bordeaux (ENSEIRB)-Centre National de la Recherche Scientifique (CNRS)-Inria Bordeaux - Sud-Ouest, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Institut des Maladies Neurodégénératives [Bordeaux] (IMN), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Université de Bordeaux (UB), Université de Bordeaux (UB)-École Nationale Supérieure d'Électronique, Informatique et Radiocommunications de Bordeaux (ENSEIRB)-Centre National de la Recherche Scientifique (CNRS), ASML [VELDHOVEN] (ASML), ASML Netherlands B.V., Statistical Machine Learning and Parsimony (SIERRA), Département d'informatique - ENS Paris (DI-ENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre National de la Recherche Scientifique (CNRS)-Inria Paris-Rocquencourt, Institut National de Recherche en Informatique et en Automatique (Inria), George Mason University [Fairfax], Aalto University, anybox, Enthought Inc, New Technologies Research Centre [Plzeň] (NTC), University of West Bohemia [Plzeň ], Pythonian, Serenytics, Eventbrite, Inria Saclay - Ile de France, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Service NEUROSPIN (NEUROSPIN), 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 Paris-Saclay, Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Électronique, Informatique et Radiocommunications de Bordeaux (ENSEIRB)-Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Électronique, Informatique et Radiocommunications de Bordeaux (ENSEIRB)-Inria Bordeaux - Sud-Ouest, Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Électronique, Informatique et Radiocommunications de Bordeaux (ENSEIRB), Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche en Informatique et en Automatique (Inria)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche en Informatique et en Automatique (Inria)-École normale supérieure - Paris (ENS Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Inria Paris-Rocquencourt

Subjects
scientific computing, [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], Scipy, scientific Python, [INFO]Computer Science [cs]
Abstract

International audience; Tutorials on the scientific Python ecosystem: a quick introduction to central tools and techniques. The different chapters each correspond to a 1 to 2 hours course with increasing level of expertise, from beginner to expert.

Published
2015
Full Text
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10. Modeling and estimation of the cardiac electromechanical activity

Author

Sainte-Marie, Jacques, Chapelle, Dominique, Cimrman, R., Sorine, Michel, Centre d'Études Techniques Maritimes et Fluviales (CETMEF), Avant création Cerema, Modeling, analysis and control in computational structural dynamics (MACS), Inria Paris-Rocquencourt, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), New Technologies Research Centre [Plzeň] (NTC), University of West Bohemia [Plzeň ], and Applications and Tools of Automatic Control (SOSSO2)

Subjects
[SPI.MECA.BIOM]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Biomechanics [physics.med-ph], [PHYS.MECA.BIOM]Physics [physics]/Mechanics [physics]/Biomechanics [physics.med-ph], [MATH.MATH-NA]Mathematics [math]/Numerical Analysis [math.NA]
Abstract

{\it Computers \& Structures}, in press; We describe an approach that we propose to model the electromechanical behavior of the heart, and to use the model in a data assimilation procedure in order to perform an identification of the parameters and state. The modeling of the heart tissue is based on an electrically-activated contraction law formulated via multiscale considerations and is consistent with various physiological and thermomechanical key requirements. The global heart system also incorporates a simplified lumped modeling of the blood compartments. We report on numerical simulations and on validations of our model in reference and pathological conditions. Furthermore, the data assimilation procedure is intended to give access to quantities of interest for diagnosis purposes, and we present some promising results in this direction.

Published
2006

11. Modeling and estimation of the cardiac electromechanical activity

Author

Jacques Sainte-Marie, Dominique Chapelle, Michel Sorine, Robert Cimrman, Modeling, analysis and control in computational structural dynamics (MACS), Inria Paris-Rocquencourt, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), New Technologies Research Centre [Plzeň] (NTC), University of West Bohemia [Plzeň ], and SIgnals and SYstems in PHysiology & Engineering (SISYPHE)

Subjects
Engineering, business.industry, Mechanical Engineering, 0206 medical engineering, System identification, Control engineering, 02 engineering and technology, 020601 biomedical engineering, 01 natural sciences, Computer Science Applications, 010101 applied mathematics, Data assimilation, Modeling and Simulation, General Materials Science, 0101 mathematics, business, [MATH.MATH-NA]Mathematics [math]/Numerical Analysis [math.NA], Civil and Structural Engineering
Abstract

International audience; We describe an approach that we propose to model the electromechanical behavior of the heart, and to use the model in a data assimilation procedure in order to perform an identification of the parameters and state. The modeling of the heart tissue is based on an electrically-activated contraction law formulated via multiscale considerations and is consistent with various physiological and thermomechanical key requirements. The global heart system also incorporates a simplified lumped modeling of the blood compartments. We report on numerical simulations and on validations of our model in reference and pathological conditions. Furthermore, the data assimilation procedure is intended to give access to quantities of interest for diagnosis purposes, and we present some promising results in this direction.

Published
2006
Full Text
View/download PDF

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