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143 results on '"Geert L. J. A. Rikken"'

1. Dielectric magnetochiral anisotropy

Author

Geert L. J. A. Rikken and Narcis Avarvari

Subjects
Science
Abstract

The interplay between chirality and magnetism has been attracting much. Here, the authors show that the movement of bound charges in a chiral dielectric depends on the relative orientation between this movement and an external magnetic field.

Published
2022
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2. Magnetic 3d–4f Chiral Clusters Showing Multimetal Site Magneto-Chiral Dichroism

Author

Xing Wang, Shi-Qiang Wang, Jia-Nan Chen, Jian-Hua Jia, Cheng Wang, Kevin Paillot, Ivan Breslavetz, La-Sheng Long, Lansun Zheng, Geert L. J. A. Rikken, Cyrille Train, Xiang-Jian Kong, Matteo Atzori, Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI-G), Université Joseph Fourier - Grenoble 1 (UJF)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)

Subjects
Magnetics, Colloid and Surface Chemistry, Magnetic Phenomena, Organometallic Compounds, [CHIM.COOR]Chemical Sciences/Coordination chemistry, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], General Chemistry, Crystallography, X-Ray, Lanthanoid Series Elements, Biochemistry, ComputingMilieux_MISCELLANEOUS, Catalysis
Abstract

Here, we report the molecular self-assembly of hydroxido-bridged {Ln

Published
2022
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3. Role of structural dimensionality in the magneto-chiral dichroism of chiral molecular ferrimagnets

Author

Matteo Atzori, Ivan Breslavetz, Kevin Paillot, Geert L. J. A. Rikken, Cyrille Train, Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI-G), Université Joseph Fourier - Grenoble 1 (UJF)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), ANR-18-CE09-0032,MONAFER,Approche Moléculaire de composés multiferroïques nanostructurés(2018), and ANR-19-CE09-0018,MaChiNaCo,Nanocomposites hélicoïdaux pour l'induction de dichroïsme magnéto-chiral(2019)

Subjects
Materials Chemistry, [CHIM.COOR]Chemical Sciences/Coordination chemistry, General Chemistry
Abstract

International audience; Here we report on magneto-chiral dichroism (MChD) detected with visible light on the chiral molecular ferrimagnet [{CrIII(CN)6}(MnIINH2ala)3]·3H2O (X = S, R; ala = alanine). Single crystals suitable for magneto-chiral optical measurements were grown starting from enantiopure precursors. X-ray diffraction and magnetic measurements confirmed the 3D-helical structure of the material, its absolute configuration, and its ferrimagnetic ordering below 35 K. Absorption and MChD spectra were measured between 520 and 900 nm from room temperature down to 4 K. At 4 K the electronic spectrum features spin-allowed and spin-forbidden transitions of CrIII centers and metal-to-metal charge transfer bands. The MChD spectra below the magnetic ordering temperature exhibit absolute configuration-dependent MChD signals, whose shape and intensity closely resamble that of a recently investigated 2D-layered chiral ferrimagnet featuring the same building blocks but different chiral ligands and a lower structural dimensionality. By comparing the temperature and magnetic field dependence of the MChD signals in these two chiral molecular ferrimagnets, we disentangle the role of structural dimensionality on MChD intensity and provide chemical design criteria towards highly responsive magneto-chiral optical materials.

Published
2022
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4. Multifunctional Helicene‐Based Ytterbium Coordination Polymer Displaying Circularly Polarized Luminescence, Slow Magnetic Relaxation and Room Temperature Magneto‐Chiral Dichroism**

Author

Kais Dhbaibi, Maxime Grasser, Haiet Douib, Vincent Dorcet, Olivier Cador, Nicolas Vanthuyne, François Riobé, Olivier Maury, Stéphan Guy, Amina Bensalah‐Ledoux, Bruno Baguenard, Geert L. J. A. Rikken, Cyrille Train, Boris Le Guennic, Matteo Atzori, Fabrice Pointillart, Jeanne Crassous, Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Larbi Tébessi [Tebessa], Institut des Sciences Moléculaires de Marseille (ISM2), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Chimie - UMR5182 (LC), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut Lumière Matière [Villeurbanne] (ILM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI-G ), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), The French National Research Agency (ANR) and the European Research Council (ERC) are acknowledged for financial support through SMMCPL (ANR-19-CE29-0012-02) and the European Union's Horizon 2020 research and innovation program (ERC-CoG MULTIPROSMM, Grant Agreement No. 725184). MG and BLG thank the French Agreement GENCI/IDRIS-CINES centers for high-performance computing resources., ANR-19-CE29-0012,SMMCPL,Luminescence polarisée circulairement de molécules-aimants à base de lanthanide(2019), and European Project: 725184,H2020-EU.1.1. - EXCELLENT SCIENCE - European Research Council (ERC),MULTIPROSMM(2017)

Subjects
Single-molecule Magnet, [CHIM]Chemical Sciences, circularly polarized luminescence, ytterbium, General Medicine, General Chemistry, helicene, Catalysis, Magnetochiral Effect
Abstract

International audience; The combination of physical properties sensitive to molecular chirality in a single system allows the observation of fascinating phenomena such as Magneto-Chiral Dichroism (MChD) and Circularly Polarized Luminescence (CPL) having potential applications for optical data readout and display technology. Homochiral monodimensional coordination polymers of YbIII were designed from a 2,15-bis-ethynyl-hexahelicenic scaffold decorated with two terminal 4-pyridyl units. Thanks to the coordination of the chiral organic chromophore to Yb(hfac)3 units, efficient NIR-CPL activity is observed. Moreover, the specific crystal field around the YbIII induces a strong magnetic anisotropy which leads to a slow magnetic relaxation (SMM) and a remarkable room temperature MChD. The MChD-structural correlation is supported by computational investigations.

Published
2022
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5. Validation of microscopic magnetochiral dichroism theory

Author

Ángela Valentín-Pérez, Patrick Rosa, Jochen Autschbach, Kévin Paillot, Geert L. J. A. Rikken, Matteo Atzori, Elizabeth A. Hillard, Ivan Breslavetz, Miguel Cortijo, Cyrille Train, Herbert D. Ludowieg, Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI-G ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Department of Chemistry, the State University of New York at Buffalo, Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), The French National Research Agency (ANR) is acknowledged for financial support through ChiraMolCo (ANR 15-CE29-0006-02), MONAFER (ANR-18-CE09-0032), and MaChiNaCo (ANR-19-CE09-0018) projects. J.A. acknowledges grant CHE-1855470 from the NSF for supporting the theoretical component of this study. This work was also supported by the CNRS, the University of Bordeaux, the Conseil Régional de la Nouvelle Aquitaine, the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement no. 706556 CHIMMM (postdoctoral fellowship for M.C.), the Ministry of Higher Education and Research, the LabEX Amadeus and the Programme IdEx Bordeaux – LAPHIA (ANR-10-IDEX-03-02). We acknowledge J. Debray (Institut Neél–CNRS and Université Grenoble Alpes) for crystallographic skills and the tools he developed for crystal indexing and orientation. D. Leboeuf (LNCMI–CNRS) is also acknowledged for the technical assistance in crystal cutting procedures., ANR-15-CE29-0006,ChiraMolCo,Conducteurs Moléculaires Chiraux(2015), ANR-18-CE09-0032,MONAFER,Approche Moléculaire de composés multiferroïques nanostructurés(2018), ANR-19-CE09-0018,MaChiNaCo,Nanocomposites hélicoïdaux pour l'induction de dichroïsme magnéto-chiral(2019), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), and State University of New York (SUNY)

Subjects
High Energy Physics::Lattice, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Spectral line, Paramagnetism, chemistry.chemical_compound, Research Articles, Physics, Chemical Physics, Multidisciplinary, Condensed matter physics, High Energy Physics::Phenomenology, SciAdv r-articles, [CHIM.MATE]Chemical Sciences/Material chemistry, Dichroism, Condensed Matter Physics, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Magnetic field, Vibronic coupling, Optical phenomena, chemistry, Physical Sciences, Microscopic theory, 0210 nano-technology, Derivative (chemistry), Research Article
Abstract

The union between magnetism and chirality is finally validated., Magnetochiral dichroism (MChD), a fascinating manifestation of the light-matter interaction characteristic for chiral systems under magnetic fields, has become a well-established optical phenomenon reported for many different materials. However, its interpretation remains essentially phenomenological and qualitative, because the existing microscopic theory has not been quantitatively confirmed by confronting calculations based on this theory with experimental data. Here, we report the experimental low-temperature MChD spectra of two archetypal chiral paramagnetic crystals taken as model systems, tris(1,2-diaminoethane)nickel(II) and cobalt(II) nitrate, for light propagating parallel or perpendicular to the c axis of the crystals, and the calculation of the MChD spectra for the Ni(II) derivative by state-of-the-art quantum chemical calculations. By incorporating vibronic coupling, we find good agreement between experiment and theory, which opens the way for MChD to develop into a powerful chiral spectroscopic tool and provide fundamental insights for the chemical design of new magnetochiral materials for technological applications.

Published
2021
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6. Helicene-Based Ligands Enable Strong Magneto-Chiral Dichroism in a Chiral Ytterbium Complex

Author

Geert L. J. A. Rikken, Haiet Douib, Matteo Atzori, Maxime Grasser, Kais Dhbaibi, Ivan Breslavetz, Jeanne Crassous, Fabrice Pointillart, Vincent Dorcet, Boris Le Guennic, Cyrille Train, Kévin Paillot, Olivier Cador, Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), ANR-19-CE09-0018, Agence Nationale de la Recherche, 725184, H2020 European Research Council, ANR-19-CE09-0018,MaChiNaCo,Nanocomposites hélicoïdaux pour l'induction de dichroïsme magnéto-chiral(2019), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)

Subjects
Lanthanide, General Chemistry, Dichroism, 010402 general chemistry, 01 natural sciences, Biochemistry, Catalysis, Molecular electronic transition, 3. Good health, 0104 chemical sciences, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, Vibronic coupling, chemistry.chemical_compound, Crystallography, Colloid and Surface Chemistry, Enantiopure drug, Helicene, chemistry, Crystal field theory, [CHIM.COOR]Chemical Sciences/Coordination chemistry, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], Chirality (chemistry)
Abstract

International audience; Here we report the first experimental observation of magneto-chiral dichroism (MChD) detected through light absorption in an enantiopure lanthanide complex. The and enantiomers of [Yb(()-)()] (X = , ; = 3-(2-pyridyl)-4-aza[6]-helicene; = 1,1,1,5,5,5-hexafluoroacetylacetonate), where the chirality is held by the helicene-based ligand, were studied in the near-infrared spectral window. When irradiated with unpolarized light in a magnetic field, these chiral complexes exhibit a strong MChD signal ( ca. 0.12 T) associated with the F ← F electronic transition of Yb. The low temperature absorption and MChD spectra reveal a fine structure associated with crystal field splitting and vibronic coupling. The temperature dependence of the main dichroic signal detected up to 150 K allowed, for the first time, the disentanglement of the two main microscopic contributions to the dichroic signal predicted by the MChD theory. These findings pave the way toward probing MChD in chiral lanthanide-based single-molecule magnets.

Published
2021
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7. Detection of the Faraday Chiral Anisotropy

Author

Jaime E. Santos, Munuswamy Venkatesan, Christos Tserkezis, Geert L. J. A. Rikken, Paulina Plochocka, José M. Caridad, Vojislav Krstić, J. M. D. Coey, N. Asger Mortensen, Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, University of Southern Denmark (SDU), Universidade do Minho = University of Minho [Braga], Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Wroclaw University of Science and Technology, Danmarks Tekniske Universitet = Technical University of Denmark (DTU), and Friedrich-Alexander Universität Erlangen-Nürnberg (FAU)

Subjects
Physics, Condensed matter physics, Electromagnetic Phenomena, General Physics and Astronomy, Metamaterial, Physics::Optics, Context (language use), 01 natural sciences, Fundamental interaction, law.invention, Negative refraction, law, Electromagnetism, 0103 physical sciences, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], 010306 general physics, Anisotropy, Faraday cage
Abstract

International audience; The connection between chirality and electromagnetism has attracted much attention through the recent history of science, allowing the discovery of crucial nonreciprocal optical phenomena within the context of fundamental interactions between matter and light. A major phenomenon within this family is the so-called Faraday chiral anisotropy, the long-predicted but yet unobserved effect which arises due to the correlated coaction of both natural and magnetically induced optical activities at concurring wavelengths in chiral systems. Here, we report on the detection of the elusive anisotropic Faraday chiral phenomenon and demonstrate its enantioselectivity. The existence of this fundamental effect reveals the accomplishment of envisioned nonreciprocal electromagnetic metamaterials referred to as Faraday chiral media, systems where novel electromagnetic phenomena such as negative refraction of light at tunable wavelengths or even negative reflection can be realized. From a more comprehensive perspective, our findings have profound implications for the general understanding of parity-violating photon-particle interactions in magnetized media.

Published
2021
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8. Magneto‐chiral anisotropy: From fundamentals to perspectives

Author

Elizabeth A. Hillard, Cyrille Train, Matteo Atzori, Geert L. J. A. Rikken, Narcis Avarvari, Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), MOLTECH-Anjou, Université d'Angers (UA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), This work was supported by the National Agency for Research (ANR) through the PRC 15-CE29-0006-01 (ChiraMolCo), PRC 20-CE06-0023-01 (SECRETS), PRC 19CE09-0018 (MaChiNaCo), PRC 18-CE09-0032 (MONAFER), the CNRS and the Universities of Angers, Bordeaux, and the Université Grenoble Alpes. We would like to gratefully acknowledge all the collaborators who have contributed to the works described here., ANR-15-CE29-0006,ChiraMolCo,Conducteurs Moléculaires Chiraux(2015), ANR-18-CE09-0032,MONAFER,Approche Moléculaire de composés multiferroïques nanostructurés(2018), ANR-20-CE06-0023,SECRETS,Conducteurs mono-composants pour des effts induits par la chiralité(2020), ANR-19-CE09-0018,MaChiNaCo,Nanocomposites hélicoïdaux pour l'induction de dichroïsme magnéto-chiral(2019), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)

Subjects
optical properties, Terahertz radiation, chirality, 02 engineering and technology, magnetic fields, 01 natural sciences, Electric charge, Catalysis, Analytical Chemistry, 0103 physical sciences, Drug Discovery, dichroism, 010306 general physics, Anisotropy, Magneto, Spectroscopy, Pharmacology, electrical conductivity, Chemistry, Organic Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, Dichroism, 021001 nanoscience & nanotechnology, Engineering physics, Magnetic field, coordination chemistry, Homochirality, Electric current, 0210 nano-technology
Abstract

International audience; The interplay between chirality and magnetic fields gives rise to a cross effect referred to as magnetochiral anisotropy (MChA), which can manifest itself in different physical properties of chiral magnetized materials. The first experimental demonstration of MChA was by optical means with visible light. Further optical manifestations of MChA have been evidenced across most of the electromagnetic spectrum, from terahertz to X-rays. Moreover, exploiting the versatility of molecular chemistry towards chiral magnetic systems, many efforts have been made to identify the microscopic origins of optical MChA, necessary to advance the effect towards technological applications. In parallel, the replacement of light by electric current has allowed the observation of non-reciprocal electrical charge transport in both molecular and inorganic conductors as a result of electrical magneto-chiral anisotropy (eMChA). MChA in other domains such as sound propagation and photo-and electro-chemistry are still in their infancy, with only a few experimental demonstrations, and offer wide perspectives for further studies with potentially large impact, like the understanding of the homochirality of life. After a general introduction to magneto-chiral anisotropy, we give a complete review of all these phenomena, particularly during the last decade.

Published
2021
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10. Magneto-Chiral Dichroism: A Playground for Molecular Chemists

Author

Cyrille Train, Geert L. J. A. Rikken, and Matteo Atzori

Subjects
Molecular chemistry, Differential absorption, Condensed matter physics, 010405 organic chemistry, Magnetism, Chemistry, Organic Chemistry, General Chemistry, Dichroism, 010402 general chemistry, 01 natural sciences, Catalysis, 0104 chemical sciences, Magnetic field, Magnetization, Chirality (chemistry), Magneto
Abstract

Magneto-chiral dichroism (MChD) is a non-reciprocal manifestation of light-matter interaction that can be observed in chiral systems possessing a magnetization, either spontaneous or induced by an external magnetic field. It features a differential absorption or emission of unpolarized light that depends on the relative orientation of the magnetization with respect to the direction of the light propagation vector and on the absolute configuration of the system. Molecular chemistry is the best-suited route towards systems combining chirality and magnetism. Nowadays, investigation of MChD is still in its infancy although this effect might play a fundamental role in technological applications, such as optical readout of magnetic data with unpolarized light. With this Minireview, the authors provide a precise description of this unconventional effect, recall the main results obtained so far and, highlighting new challenges, underline the opportunities opened to molecular chemists interested in investigating this fascinating effect with implications in chemistry and beyond.

Published
2020

11. Magnetic Anisotropy Drives Magnetochiral Dichroism in a Chiral Molecular Helix Probed with Visible Light

Author

Kévin Paillot, Fabio Santanni, Andrea Caneschi, Geert L. J. A. Rikken, Ivan Breslavetz, Cyrille Train, Matteo Atzori, Roberta Sessoli, MOLTECH-Anjou, Université d'Angers (UA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI-G ), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratory of Molecular Magnetism, INSTM di Firenze, Laboratoire des champs magnétiques intenses (LCMI-GHMFL), Centre National de la Recherche Scientifique (CNRS), Department of Chemistry 'Ugo Schiff', Università degli Studi di Firenze = University of Florence [Firenze], Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Université d'Angers (UA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Università degli Studi di Firenze = University of Florence (UniFI), ANR-18-CE09-0032,MONAFER,Approche Moléculaire de composés multiferroïques nanostructurés(2018), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), and Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI)

Subjects
Chemistry, Magnetometer, General Chemistry, Dichroism, 010402 general chemistry, 01 natural sciences, Biochemistry, Molecular physics, Catalysis, Spectral line, 0104 chemical sciences, law.invention, Magnetic field, Magnetic anisotropy, Colloid and Surface Chemistry, law, [CHIM]Chemical Sciences, Antiferromagnetism, [CHIM.COOR]Chemical Sciences/Coordination chemistry, Anisotropy, Néel temperature, ComputingMilieux_MISCELLANEOUS
Abstract

Magnetochiral dichroism (MChD) is a nonreciprocal manifestation of light-matter interaction that can be observed in chiral magnetized systems. It features a differential absorption of unpolarized light depending on the relative orientation of the magnetic field and the light wavevector and on the absolute configuration of the system. The relevance of this effect for optical readout of magnetic data calls for a complete understanding of the microscopic parameters driving MChD with an easy-accessible and nondamaging light source, such as visible light. For this purpose, here we report on MChD detected with visible light on a chiral magnetic helix formulated as [MnIII(cyclam)(SO4)]ClO4·H2O (cyclam = 1,4,8,11-tetraazacyclotetradecane) featuring antiferromagnetically coupled anisotropic MnIII ions. Alternate current susceptibility measurements revealed the existence of a single-chain magnet behavior hidden below the canted antiferromagnetism (TN = 5.8 K) already evidenced by direct current magnetometry. A detailed analysis of the optical absorption gives access to the value of the zero-field splitting parameter D (2.9 cm-1), which quantifies the magnetic anisotropy of the MnIII centers. Below the magnetic ordering temperature of the material, the MChD spectra exhibit intense absolute configuration dependent MChD signals reaching record values of ca. 12% of the absorbed intensity for the two electronic transitions most influenced by the spin-orbit coupling of the MnIII ion. These findings set a clear route toward the design and preparation of highly MChD-responsive molecular materials.

Published
2020
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12. The Photon Hall Pinwheel Radiation of Angular Momentum by a Diffusing Magneto-optical Medium

Author

Geert L. J. A. Rikken, B. A. van Tiggelen, Laboratoire de physique et modélisation des milieux condensés (LPM2C ), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)

Subjects
Physics, Angular momentum, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Photon, Condensed matter physics, General Physics and Astronomy, FOS: Physical sciences, Physics::Optics, Radiation, 01 natural sciences, 7. Clean energy, Power (physics), Pinwheel, Hall effect, 0103 physical sciences, Poynting vector, Torque, Astrophysics::Earth and Planetary Astrophysics, 010306 general physics, Optics (physics.optics), Physics - Optics
Abstract

We consider an optically thick spherical agglomerate of magneto-optical scatterers with a central isotropic, unpolarized light source, placed in a homogeneous magnetic field. The Photon Hall Effect induces a rotating Poynting vector, both inside and outside the medium. We show that electromagnetic (orbital) angular momentum leaks out and induces a torque proportional to the injection power of the source and the photon Hall angle. This effect represents a novel class of optical phenomena, generating angular momentum from diffusive magneto-transport., 3 figures, submitted to Physical Review

Published
2020
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13. A Chiral Prussian Blue Analogue Pushes Magneto-Chiral Dichroism Limits

Author

Katsuya Inoue, Matteo Atzori, Ivan Breslavetz, Geert L. J. A. Rikken, Cyrille Train, Kévin Paillot, Dipartimento di Scienze Chimiche, Università di Cagliari, Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI-G ), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire des champs magnétiques intenses (LCMI-GHMFL), and Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS]Physics [physics], Prussian blue, Absolute configuration, General Chemistry, Dichroism, 010402 general chemistry, 01 natural sciences, Biochemistry, Catalysis, Spectral line, 0104 chemical sciences, Magnetization, Crystallography, chemistry.chemical_compound, Colloid and Surface Chemistry, chemistry, Ferrimagnetism, [CHIM]Chemical Sciences, Néel temperature, ComputingMilieux_MISCELLANEOUS, Visible spectrum
Abstract

Here we report on magneto-chiral dichroism (MChD) detected with visible light on the chiral Prussian Blue Analogue [MnII(X-pnH)(H2O)][CrIII(CN)6]·H2O (X = S, R; pn = 1,2-propanediamine). Single crystals suitable for magneto-optical measurements were grown starting from enantiopure chiral ligands. X-ray diffraction and magnetic measurements confirmed the 2D-layered structure of the material, its absolute configuration, and its ferrimagnetic ordered state below a critical temperature TC of 38 K. Absorption and MChD spectra were measured between 450 and 900 nm from room temperature down to 4 K. At 4 K the electronic spectrum features spin-allowed and spin-forbidden transitions of CrIII centers, spin-forbidden transitions of the MnII centers, and metal-to-metal charge transfer bands. The MChD spectra below the magnetic ordering temperature exhibit intense absolute configuration-dependent MChD signals. The temperature dependence of these signals closely follows the material magnetization. Under a magnetic fiel...

Published
2019
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14. Strong electrical magnetochiral anisotropy in tellurium

Author

Geert L. J. A. Rikken, Narcis Avarvari, Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Chimie, Ingénierie Moléculaire et Matériaux d'Angers (CIMMA), Université d'Angers (UA)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), MOLTECH-Anjou, and Université d'Angers (UA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
FOS: Physical sciences, chemistry.chemical_element, 02 engineering and technology, 01 natural sciences, symbols.namesake, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, Physics::Atomic Physics, Tensor, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], 010306 general physics, Anisotropy, Electronic band structure, ComputingMilieux_MISCELLANEOUS, [PHYS]Physics [physics], Physics, Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed matter physics, Materials Science (cond-mat.mtrl-sci), Trigonal crystal system, 021001 nanoscience & nanotechnology, chemistry, [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], Boltzmann constant, symbols, 0210 nano-technology, Tellurium
Abstract

We report the experimental observation of strong electrical magnetochiral anisotropy in trigonal tellurium ($t$-Te) crystals. We introduce the tensorial character of the effect and determine several tensor elements. We present a simple model based on the band structure of $t$-Te and the Boltzmann relaxation time approximation which gives a reasonable description of the principal results.

Published
2019
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15. New high homogeneity 55 T pulsed magnet for high field NMR

Author

Geert L. J. A. Rikken, A. Orlova, P. Frings, M. Suleiman, Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])

Subjects
Nuclear and High Energy Physics, Resistive touchscreen, Materials science, Condensed matter physics, Biophysics, equipment and supplies, Condensed Matter Physics, 01 natural sciences, Biochemistry, 010305 fluids & plasmas, Magnetic field, [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con], Sample volume, Dipole magnet, Pulsed magnet, Magnet, 0103 physical sciences, Homogeneity (physics), High field, 010306 general physics, human activities, ComputingMilieux_MISCELLANEOUS
Abstract

Pulsed magnets can produce magnetic fields largely exceeding those achieved with resistive or even hybrid magnets. This kind of magnet is indispensable in studies of field-induced phenomena which occur only in high magnetic field. A new high homogeneous pulsed magnet capable of producing field up to 55 T and specially designed for NMR experiments was built and tested. Experimentally observed homogeneity of magnetic field in central part of the magnet is 10 ppm over a sample volume of 2–3 mm3 at 12 T and 30 ppm at 47 T, which are the best values ever reported for a pulsed magnet. Reasons which affect the field profile and reduce homogeneity at high field are discussed.

Published
2016
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16. High magnetic fields for fundamental physics

Author

I. G. Irastorza, Ziad Melhem, Arran Phipps, Mikhail Kozlov, Toshiaki Inada, Pierre Pugnat, Geert L. J. A. Rikken, E. J. Daw, Victor V. Flambaum, Felix Karbstein, Herman H.J. ten Kate, J. Béard, Nicolas Bruyant, Sebastian Böser, Matthias Schott, Scott A. Crooker, Yannis K. Semertzidis, Dmitry Budker, Guido Zavattini, Carlo Rizzo, Remy Battesti, Dong Lak Kim, Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Grenoble Alpes (UGA), Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Grenoble Alpes (UGA), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI-G), Université Joseph Fourier - Grenoble 1 (UJF)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Laboratoire national des champs magnétiques intenses - Toulouse ( LNCMI ), Institut National des Sciences Appliquées - Toulouse ( INSA Toulouse ), Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire national des champs magnétiques intenses - Grenoble ( LNCMI ), Centre National de la Recherche Scientifique ( CNRS ), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Johannes Gutenberg - Universität Mainz = Johannes Gutenberg University (JGU), Helmholtz Institute Mainz (HIM), Department of Physics [Berkeley], University of California [Berkeley] (UC Berkeley), University of California (UC)-University of California (UC), Lawrence Berkeley National Laboratory [Berkeley] (LBNL), and Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI-G )

Subjects
Astrophysics and Astronomy, Physics - Instrumentation and Detectors, magnet: design, magnetic field: high, Atomic Physics (physics.atom-ph), Axions, Dark matter, Complex system, Other Fields of Physics, FOS: Physical sciences, General Physics and Astronomy, 01 natural sciences, physics.atom-ph, NO, Physics - Atomic Physics, Nuclear physics, Physics and Astronomy (all), Neutrino mass, 0103 physical sciences, [ PHYS.PHYS.PHYS-GEN-PH ] Physics [physics]/Physics [physics]/General Physics [physics.gen-ph], High-field magnets, Spectroscopy, Vacuum birefringence, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, 010306 general physics, Instrumentation and Methods for Astrophysics (astro-ph.IM), [ PHYS.PHYS.PHYS-INS-DET ] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Axion, physics.ins-det, activity report, Exotic atom, Physics, 010308 nuclear & particles physics, Instrumentation and Detectors (physics.ins-det), Polarization (waves), magnet: technology, [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph], 3. Good health, Magnetic field, Antimatter, Magnet, Astrophysics - Instrumentation and Methods for Astrophysics, astro-ph.IM
Abstract

Various fundamental-physics experiments such as measurement of the birefringence of the vacuum, searches for ultralight dark matter (e.g., axions), and precision spectroscopy of complex systems (including exotic atoms containing antimatter constituents) are enabled by high-field magnets. We give an overview of current and future experiments and discuss the state-of-the-art DC- and pulsed-magnet technologies and prospects for future developments., 49 pages, 32 figures

Published
2018
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17. Nuclear Magnetic Resonance Signature of the Spin-Nematic Phase in LiCuVO4 at High Magnetic Fields

Author

E. L. Green, Anna Orlova, Denis Gorbunov, Geoffrey Chanda, Geert L. J. A. Rikken, Joseph M. Law, Reinhard K. Kremer, J. Wosnitza, Steffen Krämer, and Mladen Horvatić

Subjects
Physics, Field (physics), General Physics and Astronomy, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Symmetry (physics), Magnetic field, Crystal, Dipole, Magnetization, Nuclear magnetic resonance, Liquid crystal, 0103 physical sciences, Condensed Matter::Strongly Correlated Electrons, 010306 general physics, 0210 nano-technology, Spin (physics)
Abstract

We report a ^{51}V nuclear magnetic resonance investigation of the frustrated spin-1/2 chain compound LiCuVO_{4}, performed in pulsed magnetic fields and focused on high-field phases up to 56 T. For the crystal orientations H∥c and H∥b, we find a narrow field region just below the magnetic saturation where the local magnetization remains uniform and homogeneous, while its value is field dependent. This behavior is the first microscopic signature of the spin-nematic state, breaking spin-rotation symmetry without generating any transverse dipolar order, and is consistent with theoretical predictions for the LiCuVO_{4} compound.

Published
2017
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18. Chiral Nanomagnets

Author

Sahand Eslami, John G. Gibbs, Yvonne Rechkemmer, Joris van Slageren, Mariana Alarcón-Correa, Tung-Chun Lee, Andrew G. Mark, Geert L. J. A. Rikken, and Peer Fischer

Subjects
Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics, Biotechnology, Electronic, Optical and Magnetic Materials
Abstract

We report on the enhanced optical properties of chiral magnetic nanohelices with critical dimensions comparable to the ferromagnetic domain size. They are shown to be ferromagnetic at room temperature, have defined chirality, and exhibit large optical activity in the visible as verified by electron microscopy, superconducting quantum interference device (SQUID) magnetometry, natural circular dichroism (NCD), and magnetic circular dichroism (MCD) measurements. The structures exhibit magneto-chiral dichroism (MChD), which directly demonstrates coupling between their structural chirality and magnetism. A chiral nickel (Ni) film consisting of an array of nanohelices ∼100 nm in length exhibits an MChD anisotropy factor gMChD ≈ 10–4 T–1 at room temperature in a saturation field of ∼0.2 T, permitting polarization-independent control of the film’s absorption properties through magnetic field modulation. This is also the first report of MChD in a material with structural chirality on the order of the wavelength of light, and therefore the Ni nanohelix array is a metamaterial with magnetochiral properties that can be tailored through a dynamic deposition process.

Published
2014
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20. A complex-polarization-propagator protocol for magneto-chiral axial dichroism and birefringence dispersion

Author

Antonio Rizzo, Geert L. J. A. Rikken, Patrick Norman, Janusz Cukras, Sonia Coriani, Joanna Kauczor, Cukras, JANUSZ WIKTOR, Kauczor, Joanna, Norman, Patrick, Rizzo, Antonio, Rikken, Geert L. J. A., Coriani, Sonia, Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)

Subjects
complex polarization propagator, High Energy Physics::Lattice, General Physics and Astronomy, Physics::Optics, 010402 general chemistry, Magneto-optical activity, 01 natural sciences, Magneto-chiral dichroism, complex polarization propagator, density functional theory, magneto-chiral birefringence, density functional theory (DFT), magneto-chiral birefringence, 0103 physical sciences, Damped Response Functions, Physics::Atomic Physics, Physical and Theoretical Chemistry, density functional theory, ComputingMilieux_MISCELLANEOUS, Physics, Birefringence, Magnetochiral dichroism, 010304 chemical physics, Condensed matter physics, High Energy Physics::Phenomenology, Magneto-chiral dichroism, Propagator, Dichroism, Polarization (waves), 0104 chemical sciences, [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con], Density functional theory
Abstract

A computational protocol for magneto-chiral dichroism and magneto-chiral birefringence dispersion is presented within the framework of damped response theory, also known as complex polarization propagator theory, at the level of time-dependent Hartree–Fock and time-dependent density functionaltheory. Magneto-chiral dichroism and magneto-chiral birefringence spectra in the (resonant) frequency region below the first ionization threshold of R-methyloxirane and L-alanine are presented and compared with the corresponding results obtained for both the electronic circular dichroism and the magneticcircular dichroism. The additional information content yielded by the magneto-chiral phenomena, as well as their potential experimental detectability for the selected species, is discussed.

Published
2016
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21. Ab initio study of the enantio-selective magnetic-field-induced second harmonic generation in chiral molecules

Author

Renaud Mathevet, Geert L. J. A. Rikken, Antonio Rizzo, Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])

Subjects
Electronic correlation, Chemistry, Ab initio, General Physics and Astronomy, Second-harmonic generation, Stereoisomerism, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Molecular physics, 0104 chemical sciences, Magnetic field, Prolinol, [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con], chemistry.chemical_compound, Magnetics, Computational chemistry, Molecule, Density functional theory, Nonlinear optical properties, Magnetic Field, SHG, Physical and Theoretical Chemistry, 0210 nano-technology, Basis set, ComputingMilieux_MISCELLANEOUS
Abstract

We present a systematic ab initio study of enantio-selective magnetic-field-induced second harmonic generation (MFISHG) on a set of chiral systems ((L)-alanine, (L)-arginine and (L)-cysteine; 3,4-dehydro-(L)-proline; (S)-a-phellandrene; (R,S)- and (S,S)-cystine disulphide; N-(4-nitrophenyl)-(S)-prolinol, N-(4-(2-nitrovinyl)-phenyl)- (S)-prolinol, N-(4-tricyanovinyl-phenyl)-(S)-prolinol, (R)-BINOL, (S)-BINAM and 6-(M)-helicene). The needed electronic frequency dependent cubic response calculations are performed within a density functional theory (DFT) approach. A study of the dependence of the property on the choice of electron correlation, on one-electron basis set extension and on the choice of magnetic gauge origin is carried out on a prototype system (twisted oxygen peroxide). The magnetic gauge dependence analysis is extended also to the molecules of the set. An attempt to analyze the structure-property relationships is also made, based on the results obtained for biphenyl (in a frozen twisted conformation), for prolinol and for some of their derivatives. The strength of the effect is discussed, in order to establish its measur- ability with a proposed experimental setup.

Published
2016
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22. Quantum vacuum magnetic birefringence

Author

Marc Nardone, Oliver Portugall, Paul Berceau, Remy Battesti, Mathilde Fouché, Geert L. J. A. Rikken, Carlo Rizzo, P. Frings, Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, Birefringence, Condensed matter physics, 010308 nuclear & particles physics, Resonant cavity, Condensed Matter Physics, 01 natural sciences, Atomic and Molecular Physics, and Optics, Magnetic field, [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con], Vacuum energy, 0103 physical sciences, Physical and Theoretical Chemistry, 010306 general physics, ComputingMilieux_MISCELLANEOUS
Abstract

In this contribution to EXA2011 congress, we present the status of the BMV (Birefringence Magnetique du Vide) experiment which is based on the use of a state-of-the-art optical resonant cavity and high pulsed magnetic fields, and it is hosted by the Laboratoire National des Champs Magnetiques Intenses in Toulouse, France.

Published
2011
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23. Chirality and magnetism II: Free electron on an infinite helix, inverse Faraday effect and inverse magnetochiral effect

Author

Georges H. Wagnière and Geert L. J. A. Rikken

Subjects
Inverse Faraday effect, Physics, Condensed matter physics, Magnetism, General Physics and Astronomy, Dichroism, Polarization (waves), law.invention, Magnetic field, Paramagnetism, symbols.namesake, law, Faraday effect, symbols, Physical and Theoretical Chemistry, Faraday rotator
Abstract

The interplay of chirality and magnetism is of fundamental physical interest. A free electron on a helix with periodic boundary conditions is possibly the simplest model exhibiting both chirality and orbital paramagnetism. In a previous report we have studied with this model the relation between natural circular, magnetic circular and magnetochiral dichroism. Here we extend our investigation to the second-order nonlinear optical phenomena designated as the inverse Faraday effect and as the inverse magnetochiral effect. Both effects manifest themselves as a radiation-induced time-independent magnetic field which lifts the magnetic degeneracy of the system. While the inverse Faraday effect is circular differential, the comparatively much weaker inverse magnetochiral effect is independent of the polarization of the incident radiation.

Published
2011
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24. Strong magneto-chiral dichroism in enantiopure chiral ferromagnets

Author

Nikolai S. Ovanesyan, Lise-Marie Chamoreau, Geert L. J. A. Rikken, Michel Gruselle, Cyrille Train, V. Krstić, Michel Verdaguer, and Ruxandra Gheorghe

Subjects
Materials science, 010405 organic chemistry, Stereochemistry, Mechanical Engineering, Ab initio, Enantioselective synthesis, General Chemistry, Dichroism, 010402 general chemistry, Condensed Matter Physics, 01 natural sciences, 0104 chemical sciences, Condensed Matter::Materials Science, Crystallography, Magnetization, Enantiopure drug, Ferromagnetism, Mechanics of Materials, Phase (matter), Curie temperature, Condensed Matter::Strongly Correlated Electrons, General Materials Science
Abstract

As materials science is moving towards the synthesis, the study and the processing of new materials exhibiting well-defined and complex functions, the synthesis of new multifunctional materials is one of the important challenges. One of these complex physical properties is magneto-chiral dichroism which arises, at second order, from the coexistence of spatial asymmetry and magnetization in a material. Herein we report the first measurement of strong magneto-chiral dichroism in an enantiopure chiral ferromagnet. The ab initio synthesis of the enantiopure chiral ferromagnet is based on an enantioselective self-assembly, where a resolved chiral quaternary ammonium cation imposes the absolute configurations of the metal centres within chromium-manganese two-dimensional oxalate layers. The ferromagnetic interaction between Cr(III) and Mn(II) ions leads to a Curie temperature of 7 K. The magneto-chiral dichroic effect is enhanced by a factor of 17 when entering into the ferromagnetic phase.

Published
2008
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26. MAGNETO SPECTROSCOPY OF SINGLE-WALLED CARBON NANOTUBES

Author

Richard E. Smalley, Oliver Portugall, Yuhei Miyauchi, Jonah Shaver, S. Zaric, Valerie C. Moore, Robert H. Hauge, Geert L. J. A. Rikken, Shigeo Maruyama, Junichiro Kono, Vojislav Krstić, Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Condensed matter physics, Exciton, chemistry.chemical_element, Statistical and Nonlinear Physics, 02 engineering and technology, Carbon nanotube, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Magnetic field, law.invention, [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con], Condensed Matter::Materials Science, chemistry, law, Phase (matter), 0103 physical sciences, Symmetry breaking, 010306 general physics, 0210 nano-technology, Spectroscopy, Carbon, Magneto
Abstract

Carbon nano-tubes (CNTs) are attracting tremendous interest as the object of fundamental studies in condensed matter and molecular physics as well as possible functional units for future nano-devices. Some of the most striking features of CNTs are related to the symmetry breaking effect of high magnetic fields threading the tube axis. In the present paper we review the results of recent magneto-optical studies of single-walled CNTs in pulsed magnetic fields up to 71 T and at temperatures between 4.2 and 300 K. We present clear evidence for (a) the effect of the Aharonov-Bohm phase on the bandstructure of CNTs, (b) the existence of dark excitons in CNTs due to Coulomb mixing and (c) the effect of magnetic brightening, i.e. the increase of the quantum yield of CNTs under the influence of an external field. Experimental data was derived from large ensembles of individualized tubes in either aligned films or in liquid suspension. A brief discussion of the effect of dynamic magnetic alignment of suspended tubes will be included.

Published
2007
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27. Magneto-optical spectroscopy of carbon nanotubes

Author

Scott A. Crooker, X. Wei, Valerie C. Moore, P.H. Frings, Robert H. Hauge, Junichiro Kono, Madalina Furis, Oliver Portugall, G. N. Ostojic, Jonah Shaver, Geert L. J. A. Rikken, S. Zaric, and Richard E. Smalley

Subjects
Photoluminescence, Materials science, Absorption spectroscopy, Condensed matter physics, Carbon nanotube, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention, Magnetic field, Optical properties of carbon nanotubes, symbols.namesake, law, symbols, Spectroscopy, Absorption (electromagnetic radiation), Aharonov–Bohm effect
Abstract

We review our recent optical experiments on single-walled carbon nanotubes in high magnetic fields. The data revealed magnetic-field-induced optical anisotropy as well as broadening, splittings, and shifts of interband absorption and photoluminescence peaks. Quantitative comparison with theoretical predictions based on the Aharonov–Bohm effect is presented. r 2005 Elsevier B.V. All rights reserved. PACS: 73.22.� f; 78.67.Ch; 75.75.+a

Published
2005
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28. Light induced dynamic magnetochiral anisotropy

Author

Georges H. Wagnière, Geert L. J. A. Rikken, V. Krstić, B. A. van Tiggelen, Laboratoire de physique et modélisation des milieux condensés (LPM2C), Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des champs magnétiques intenses (LCMI-GHMFL), and Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Condensed matter physics, Magnetic energy, Isotropy, Demagnetizing field, General Physics and Astronomy, 010402 general chemistry, 01 natural sciences, Electron magnetic dipole moment, 0104 chemical sciences, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, Paramagnetism, Magnetic anisotropy, 0103 physical sciences, Magnetic pressure, Physical and Theoretical Chemistry, 010306 general physics, Magnetic dipole
Abstract

International audience; In this Letter, we show that chiral molecules subject to a magnetic field in isotropic radiation fields acquire a linear momentum along the field. We also show the existence of the inverse effect, where a chiral molecule moving in an isotropic radiation field acquires a magnetic moment along its velocity.

Published
2005
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29. Cellular disorders induced by high magnetic fields.: High Magnetic Fields in Biology

Author

Odile Valiron, Geert L. J. A. Rikken, Didier Job, Annie Schweitzer, Chantal Rémy, Leticia Peris, Yasmina Saoudi, Organisation Fonctionnelle du Cytosquelette, Université Joseph Fourier - Grenoble 1 (UJF)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-IFR27, Laboratoire des champs magnétiques intenses (LCMI-GHMFL), Centre National de la Recherche Scientifique (CNRS), Neuroimagerie Fonctionnelle et Metabolique, Université Joseph Fourier - Grenoble 1 (UJF)-Institut National de la Santé et de la Recherche Médicale (INSERM), and La Ligue Nationale Contre le Cancer ('équipe labellisée Ligue') to DJ

Subjects
Cellular differentiation, Cell, MESH: Neurons, Apoptosis, MESH: Cell Cycle, 030218 nuclear medicine & medical imaging, Mice, 0302 clinical medicine, MESH: Animals, High Magnetic Field, Cytoskeleton, Cells, Cultured, Neurons, 0303 health sciences, Chemistry, Cell Cycle, Cell Differentiation, cytoskeleton, Anatomy, Magnetic Resonance Imaging, Cell biology, medicine.anatomical_structure, MESH: Cell Survival, MESH: Cell Division, [SDV.IB]Life Sciences [q-bio]/Bioengineering, Cell Division, MESH: Cells, Cultured, MESH: Cell Differentiation, MESH: Rats, Cell Survival, MESH: Cell Physiological Phenomena, [SDV.BC]Life Sciences [q-bio]/Cellular Biology, Transfection, Cell Physiological Phenomena, Focal adhesion, Magnetics, 03 medical and health sciences, MESH: Cytoskeleton, medicine, Animals, Humans, MESH: Magnetics, Radiology, Nuclear Medicine and imaging, Viability assay, Cell adhesion, Growth cone, MESH: Mice, Actin, 030304 developmental biology, cellular effects, MESH: Humans, MESH: Apoptosis, MESH: Transfection, Rats
Abstract

Purpose To evaluate whether static high magnetic fields (HMFs), in the range of 10–17 T, affect the cytoskeleton and cell organization in different types of mammalian cells, including fibroblasts, epithelial cells, and differentiating neurons. Materials and Methods Cells were exposed to HMF for 30 or 60 minutes and subsequently assessed for viability. Cytoskeleton arrays and focal adhesions were visualized using immunofluorescence microscopy. Results Cell exposure to HMF over 10 T in the case of cycling cells, and over 15 T in the case of neurons, affected cell viability, apparently because of cell detachment from culture dishes. In the remaining adherent cells, the organization of actin assemblies was perturbed, and both cell adhesion and spreading were impaired. Moreover, in the case of neurons, exposure to HMF induced growth cone retraction and delayed cell differentiation. Conclusion Cell exposure to HMF (over 10T and 15 T in the case of cycling cells and neurons, respectively) affects the cell cytoskeleton, with deleterious effects on cell viability, organization, and differentiation. Further studies are needed to determine whether such perturbations, as observed here in cultured cells, have consequences in whole animals. J. Magn. Reson. Imaging 2005. © 2005 Wiley-Liss, Inc.

Published
2005
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30. Magneto-chiral anisotropy of the free electron on a helix

Author

V. Krstić and Geert L. J. A. Rikken

Subjects
Free electron model, SIMPLE (dark matter experiment), Condensed matter physics, Chemistry, General Physics and Astronomy, Carbon nanotube, Magnetostatics, law.invention, Magnetic field, Electrical resistivity and conductivity, law, Helix, Physical and Theoretical Chemistry, Anisotropy
Abstract

The free electron on a helix as a simple model of a molecular chiral conductor is considered. In the presence of a static magnetic field parallel to the helix axis, it is found that both ballistic and diffusive electrical transport along the helix show a conductivity that depends linearly on the current and the magnetic field and on the handedness of the helix. These results agree qualitatively with the recently experimentally observed electrical magneto-chiral anisotropy in carbon nanotubes [V. Krstic, S. Roth, M. Burghard, K. Kern, G.L.J.A. Rikken, Max-Planck-Institut fur Festkorperforschung, Stuttgart, Germany; Grenoble High Magnetic Field Laboratory, MPI-CNRS, Grenoble, France; Laboratoire National des Champs Magnetiques Pulses, CNRS/INSA/UPS, UMS 5462, Toulouse, France].

Published
2002
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31. A single-oscillator quantum model for magnetochiral birefringence

Author

Bart van Tiggelen, M. Donaire, Geert L. J. A. Rikken, Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Chemical Physics (physics.chem-ph), Physics, Birefringence, 010304 chemical physics, FOS: Physical sciences, Physics::Optics, Function (mathematics), 01 natural sciences, Atomic and Molecular Physics, and Optics, Magnetic field, [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con], Physics - Chemical Physics, 0103 physical sciences, Diamagnetism, Molecule, Physics::Chemical Physics, Atomic physics, 010306 general physics, Constant (mathematics), Quantum, Refractive index, ComputingMilieux_MISCELLANEOUS, Optics (physics.optics), Physics - Optics
Abstract

We derive an analytical expression for the magnetochiral birefringence of a dilute diamagnetic chiral molecular medium subjet to a constant magnetic field. We use the single-oscillator model of Condon et al. [1, 2] to describe the optical properties of the individual molecules. The result is a function of the refractive index and the rotatory power. This result is compared to experimental data., 5 pages

Published
2014
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32. Magnetic circular dichroism as a local probe of the polarization of a focused Gaussian beam

Author

Geert L. J. A. Rikken, Renaud Mathevet, Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])

Subjects
Materials science, Magnetic circular dichroism, business.industry, Linear polarization, Dichroism, Linear dichroism, Electronic, Optical and Magnetic Materials, [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con], Optics, X-ray magnetic circular dichroism, Vibrational circular dichroism, Atomic physics, business, Circular polarization, Gaussian beam
Abstract

International audience; We study experimentally the polarisation of an asymptotically linearly polarized focused Gaussian beam. Around the focal point the polarization state is elliptical even though optical chirality is zero. As a consequence, this field allows to observe magnetic circular dichroism, but it shouldn't give rise to natural circular dichroism. This distinction emphasizes the fundamental difference between these two forms of optical activity. This experiment, first proposed by N. Yang and A. E. Cohen [J. Phys. Chem. B 115, 5304 (2011)] is simple and sensitive. It weakly perturbs the beam propagation and probes the coherence between the field components. It is thus complementary to the existing techniques, usually only sensitive to the intensity

Published
2014
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33. Charge transfer complexes and radical cation salts of chiral methylated organosulfur donors

Author

John D. Wallis, Peter N. Horton, Caroline Melan, Geert L. J. A. Rikken, Songjie Yang, Narcis Avarvari, Pascale Auban-Senzier, Andrew C. Brooks, Lee Martin, Flavia Pop, Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), Institute of Geomatics and Analysis of Risk (IGAR), Université de Lausanne (UNIL), Laboratoire de Physique des Solides (LPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Chimie, Ingénierie Moléculaire et Matériaux d'Angers (CIMMA), Université d'Angers (UA)-Centre National de la Recherche Scientifique (CNRS), Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Lausanne = University of Lausanne (UNIL), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Valence (chemistry), Stereochemistry, General Chemistry, Condensed Matter Physics, Charge-transfer complex, [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con], Crystallography, chemistry.chemical_compound, chemistry, Radical ion, General Materials Science, Enantiomer, Single crystal, Conformational isomerism, Organosulfur compounds, Tetrathiafulvalene, ComputingMilieux_MISCELLANEOUS
Abstract

International audience; The single crystal X-ray structure of the all-axial conformer of the (R, R, R, R) enantiomer of the chiral donor tetramethyl-BEDT-TTF (TM-BEDT-TTF) was described and compared to the all-equatorial conformer. (S, S, S, S)-Tetramethyl-BEDT-TTF formed crystalline 1 : 1 complexes with TCNQ and TCNQ-F-4, as well as a THF solvate of the TCNQ complex. Donors bis((2S, 4S)-pentane-2,4-dithio) tetrathiafulvalene and (ethylenedithio)((2S, 4S)-pentane-2,4-dithio) tetrathiafulvalene, which contain seven-membered rings bearing chirally oriented methyl groups, only formed complexes with TCNQ-F4. The TCNQ-F4 complexes contain planar organosulfur systems, in contrast to the TCNQ complexes in which there is minimal charge transfer. A variety of crystal packing modes were observed. Electrocrystallization experiments with both enantiomers and the racemic form of tetramethyl-BEDT-TTF afforded mixed valence radical cation salts with the AsF6 and SbF6 anions formulated as (TM-BEDT-TTF)(2)XF6 (X = As, Sb). Electrical conductivity was only found in one charge transfer complex, while the radical cation salts are all semiconducting.

Published
2014
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34. Electrical magnetochiral anisotropy in a bulk chiral molecular conductor

Author

Narcis Avarvari, Geert L. J. A. Rikken, Flavia Pop, Pascale Auban-Senzier, Enric Canadell, MOLTECH-Anjou, Université d'Angers (UA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI-G), Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, Laboratoire de Physique des Solides (LPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Université Joseph Fourier - Grenoble 1 (UJF)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Multidisciplinary, Materials science, Condensed matter physics, High Energy Physics::Lattice, General Physics and Astronomy, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, General Biochemistry, Genetics and Molecular Biology, 0104 chemical sciences, [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con], chemistry.chemical_compound, Enantiopure drug, chemistry, Electrical resistivity and conductivity, 0210 nano-technology, Anisotropy, Chirality (chemistry), Electronic band structure, Electrical conductor, Single crystal, Tetrathiafulvalene
Abstract

So far, no effect of chirality on the electrical properties of bulk chiral conductors has been observed. Introduction of chiral information in tetrathiafulvalene precursors represents a powerful strategy towards the preparation of crystalline materials in which the combination of chirality and conducting properties might allow the observation of the electrical magnetochiral anisotropy effect. Here we report the synthesis by electrocrystallization of both enantiomers of a bulk chiral organic conductor based on an enantiopure tetrathiafulvalene derivative. The enantiomeric salts crystallize in enantiomorphic hexagonal space groups. Single crystal resistivity measurements show metallic behaviour for the enantiopure salts down to 40 K, in agreement with band structure calculations. We describe here the first experimental evidence of electrical magnetochiral anisotropy in these crystals, confirming the chiral character of charge transport in our molecular materials. Electrical magnetochiral anisotropy phenomenon describes the change in resistance of chiral materials caused by the interplay between chirality, conductivity and magnetic fields. Pop et al.show here for the first time the occurrence of this phenomenon in a bulk chiral molecular conductor.

Published
2014
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35. Recent advances in magneto-optics

Author

Geert L. J. A. Rikken, Thomas Roth, and E. Raupach

Subjects
Quantitative Biology::Biomolecules, Materials science, Birefringence, business.industry, High Energy Physics::Lattice, High Energy Physics::Phenomenology, Enantioselective synthesis, Physics::Optics, Dichroism, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Optics, Physics::Atomic Physics, Electrical and Electronic Engineering, business, Chirality (chemistry), Magneto
Abstract

We report the experimental observation of three new magneto-optical phenomena: (i) magneto-electric Jones birefringence, (ii) magneto-chiral dichroism and (iii) enantioselective magneto-chiral photochemistry.

Published
2001
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36. Photonic Hall effect in absorbing media

Author

Wiebel S, Geert L. J. A. Rikken, A. Sparenberg, van Tiggelen Ba, and David Lacoste

Subjects
Physics, Matrix (mathematics), Condensed matter physics, business.industry, Hall effect, sense organs, Photonics, Current (fluid), business, Absorption (electromagnetic radiation)
Abstract

We describe an experimental and theoretical study of the effect of optical absorption on the photonic Hall effect in a passive matrix containing magnetoactive scatterers. We find that for the case of absorbing scatterers, the magnetotransverse light current changes sign and increases with increasing absorption. Good agreement is obtained with numerical calculations. For the case of an absorbing matrix, no effect was observed.

Published
2000
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37. Modelling of magneto-chiral enantioselective photochemistry

Author

Geert L. J. A. Rikken, Cyrille Train, B. Malézieux, and E. Raupach

Subjects
Quantitative Biology::Biomolecules, Kinetic model, Chemistry, Enantioselective synthesis, General Physics and Astronomy, Astrophysics::Earth and Planetary Astrophysics, Physical and Theoretical Chemistry, Photochemistry, Magnetostatics, Magneto
Abstract

We present a kinetic model to describe the recently observed magneto-chiral enantioselective photochemistry when irradiating with unpolarized light and applying a static magnetic field. The model shows that both true and cascaded magneto-chiral enantioselective photochemistry occur and yields expressions for their respective magnitudes. Comparison of the predictions of our model with the experimental results shows good agreement.

Published
2000
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38. Photonic Hall effect of inactive Mie scatterers in a Faraday active matrix

Author

G. Düchs, Geert L. J. A. Rikken, A. Sparenberg, and B. A. van Tiggelen

Subjects
Physics, Condensed matter physics, Verdet constant, Mean free path, business.industry, Mie scattering, Physics::Optics, law.invention, Magnetic field, Matrix (mathematics), Hall effect, law, Photonics, Faraday cage, business
Abstract

We describe an experimental study of the photonic Hall effect in media consisting of a magneto-optically active matrix and magneto-optically inert Mie scatterers. We call such media reversed with respect to the normal media having magneto-optically active Mie scatterers in inert matrices in which the photonic Hall effect has been studied so far. We show the photonic Hall effect in reversed media to be proportional to VBl*, where V is the Verdet constant of the matrix, l(*) the transport mean free path of the liquid, and B the applied magnetic field. We further propose an empirical expression that unifies the results obtained in normal and reversed media and present a simple analytic model to illustrate the photonic Hall effect.

Published
2000
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39. Enantioselective magnetochiral photochemistry

Author

Geert L. J. A. Rikken and E. Raupach

Subjects
Oxalates, Evolution, Chemical, Multidisciplinary, Light, Mirror image, Photochemistry, Chemistry, Origin of Life, Enantioselective synthesis, Stereoisomerism, Polarization (waves), Chemical reaction, Magnetics, Exobiology, Chromates, Potassium, Anisotropy, Enantiomer, Homochirality, Enantiomeric excess, Chirality (chemistry)
Abstract

Many chemical and physical systems can occur in two forms distinguished solely by being mirror images of each other. This phenomenon, known as chirality, is important in biochemistry, where reactions involving chiral molecules often require the participation of one specific enantiomer (mirror image) of the two possible ones. In fact, terrestrial life utilizes only the L enantiomers of amino acids, a pattern that is known as the ‘homochirality of life’ and which has stimulated long-standing efforts to understand its origin1. Reactions can proceed enantioselectively if chiral reactants or catalysts are involved, or if some external chiral influence is present2. But because chiral reactants and catalysts themselves require an enantioselective production process, efforts to understand the homochirality of life have focused on external chiral influences. One such external influence is circularly polarized light, which can influence the chirality of photochemical reaction products2,13,14. Because natural optical activity, which occurs exclusively in media lacking mirror symmetry, and magnetic optical activity, which can occur in all media and is induced by longitudinal magnetic fields, both cause polarization rotation of light, the potential for magnetically induced enantioselectivity in chemical reactions has been investigated, but no convincing demonstrations of such an effect have been found2,3,4. Here we show experimentally that magnetochiral anisotropy—an effect linking chirality and magnetism5,6,7—can give rise to an enantiomeric excess in a photochemical reaction driven by unpolarized light in a parallel magnetic field, which suggests that this effect may have played a role in the origin of the homochirality of life.

Published
2000
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40. Chirality and magnetism: Free electron on an infinite helix, NCD, MCD, and magnetochiral dichroism

Author

Geert L. J. A. Rikken and Georges H. Wagnière

Subjects
Physics, Quantitative Biology::Biomolecules, Circular dichroism, Condensed matter physics, Magnetic circular dichroism, Magnetism, General Physics and Astronomy, 02 engineering and technology, Dichroism, 010402 general chemistry, 021001 nanoscience & nanotechnology, Linear dichroism, 01 natural sciences, 0104 chemical sciences, Condensed Matter::Materials Science, X-ray magnetic circular dichroism, Vibrational circular dichroism, Physical and Theoretical Chemistry, 0210 nano-technology, Chirality (chemistry)
Abstract

The free electron on a helix with periodic boundary conditions is undoubtedly one of the simplest quantum chemical models exhibiting both chirality and orbital angular momentum. Subjected to a light beam traveling parallel to the helix axis, the model exhibits natural circular dichroism and, assuming a lifting of the magnetic degeneracy by an external static magnetic field, also magnetic circular dichroism and magnetochiral dichroism. We believe that the model illustrates well the interplay of chirality and magnetism in a pure magnetic state, and that it could also be of interest in the study of the recently discovered chiral ferromagnets.

Published
2009
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41. Pure and cascaded magnetochiral anisotropy in optical absorption

Author

E. Raupach and Geert L. J. A. Rikken

Subjects
Materials science, Optics, Condensed matter physics, business.industry, Absorption (electromagnetic radiation), business, Anisotropy, Magnetic field
Abstract

In this paper we study the optical absorption of chiral media subject to a magnetic field parallel to the light. It is shown to exhibit pure and cascaded magnetochiral anisotropy. We present experimental evidence for the existence of pure magnetochiral anisotropy in absorption.

Published
1998
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42. Spontaneous emission from a dielectric slab

Author

Geert L. J. A. Rikken and H. P. Urbach

Subjects
Electromagnetic field, Physics, Condensed matter physics, business.industry, Physics::Optics, Substrate (electronics), Dielectric, Atomic and Molecular Physics, and Optics, Condensed Matter::Materials Science, Optics, Position (vector), Orthonormal basis, Spontaneous emission, Stimulated emission, business, Refractive index
Abstract

The electromagnetic field in a dielectric slab bounded by two dielectric half spaces with arbitrary refractive indices is quantized by computing the complete set of orthonormal electromagnetic modes. The zero-point fluctuations of the electromagnetic field are determined as a function of position. The dependence of the rate of spontaneous emission of thin dielectric films on the thicknesses of the films and the refractive index of the substrate is studied and compared with experimental results.

Published
1998
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43. Photonic magneto-transport

Author

A. Sparenberg, Geert L. J. A. Rikken, and B. A. van Tiggelen

Subjects
Physics, Condensed matter physics, Magnetoresistance, business.industry, Scattering, Physics::Optics, Condensed Matter Physics, Light scattering, Electronic, Optical and Magnetic Materials, Magnetic field, Hall effect, Optoelectronics, Diffuse reflection, Electrical and Electronic Engineering, Photonics, business, Magneto
Abstract

We report the observation of photonic analogues of electronic magneto-transport phenomena which appear in the magnetic field dependence of diffuse light transmission through random media. Both a photonic Hall effect and photonic magneto-resistance have been found to be in reasonable agreement with recent theoretical predictions.

Published
1998
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44. Observation of Photonic Magnetoresistance

Author

Geert L. J. A. Rikken, A. Sparenberg, and B. A. van Tiggelen

Subjects
Physics, Quadratic equation, Magnetoresistance, Condensed matter physics, Transmission (telecommunications), business.industry, Quantum mechanics, General Physics and Astronomy, Random media, Diffuse reflection, Photonics, business
Abstract

In this Letter, we report the observation of a quadratic magnetic-field dependence of diffuse light transmission through random media. This effect constitutes the photonic analogon of magnetoresistance known for diffusive electronic transport. The experiments are found to be in good agreement with recent theoretical predictions.

Published
1997
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45. Origin of the saturation of the third-order optical nonlinear response of one-dimensional conjugated systems

Author

Hugo Thienpont, Yves Verbandt, Paul Geerlings, Irina Veretennicoff, and Geert L. J. A. Rikken

Subjects
Quantitative Biology::Biomolecules, Thermochromism, Chemistry, General Physics and Astronomy, Conjugated system, Polyene, Nonlinear system, chemistry.chemical_compound, Chemical physics, Computational chemistry, Quantum harmonic oscillator, Thiophene, Molecule, Physics::Chemical Physics, Physical and Theoretical Chemistry, Saturation (chemistry)
Abstract

The coupled quantum oscillator model is applied to the evaluation of conformational effects in thiophene and polyene oligomers. Thermochromism measurements on heptathiophene are presented and modeled. The effect of conformation is also studied in recently published nonlinear optical experiments on polyene oligomers. It is shown that the model accounts for a masterplot which summarizes the length dependence of the optical properties of conjugated molecules.

Published
1997
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46. Direction of Optical Energy Flow in a Transverse Magnetic Field

Author

B. A. van Tiggelen and Geert L. J. A. Rikken

Subjects
Physics, Deflection (physics), Magnetic energy, Flow (mathematics), Transverse magnetic field, Poynting vector, General Physics and Astronomy, Transverse wave, Magnetic pressure, Circular polarization, Computational physics
Abstract

In this Letter, we report a theoretical and experimental study of the direction of optical energy flow in homogeneous media subject to a transverse magnetic field. For transparent media we verify experimentally for the first time the existence of magnetic deflection of circularly polarized light. In absorbing media the calculated directions of the Poynting vector and of a wave packet do not coincide. Experimentally we demonstrate that the Poynting vector result is not correct.

Published
1997
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47. Casimir Momentum of a Chiral Molecule in a Magnetic Field

Author

B. A. van Tiggelen, Geert L. J. A. Rikken, M. Donaire, Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire National des Champs Magnétiques Pulsés (LNCMP), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Laboratoire de physique et modélisation des milieux condensés (LPM2C), Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI-G), Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Université Joseph Fourier - Grenoble 1 (UJF)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)

Subjects
PACS: 11.10.-z, 32.10.Fn, 32.60.+i, 42.50.Ct, General Physics and Astronomy, FOS: Physical sciences, Kinetic energy, 01 natural sciences, 010305 fluids & plasmas, Momentum, Casimir momentum, Vacuum energy, [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], Total angular momentum quantum number, Quantum mechanics, Physics - Chemical Physics, 0103 physical sciences, 010306 general physics, ComputingMilieux_MISCELLANEOUS, Physics, Chemical Physics (physics.chem-ph), Quantum Physics, Magnetic moment, quantum vacuum, Symmetry (physics), Magnetic field, Casimir effect, [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con], Quantum electrodynamics, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Quantum Physics (quant-ph)
Abstract

In a classical description, a neutral, polarizable object acquires a kinetic momentum when exposed to crossed electric and magnetic fields. In the presence of only a magnetic field no such momentum exists classically, although it is symmetry-allowed for an object lacking mirror symmetry. We perform a full QED calculation to show that the quantum vacuum coupled to a chiral molecule provides a kinetic "Casimir" momentum directed along the magnetic field, proportional to its rotatory power and the fine structure constant., 5 pages + Supplemental material

Published
2013
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48. Transverse Momentum Transfer in Atom-Light Scattering

Author

A. Nussle, B. A. van Tiggelen, Geert L. J. A. Rikken, Laboratoire de physique et modélisation des milieux condensés (LPM2C), Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI-G), Université Joseph Fourier - Grenoble 1 (UJF)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées

Subjects
Photon, Field (physics), Atomic Physics (physics.atom-ph), Mie scattering, FOS: Physical sciences, 01 natural sciences, 7. Clean energy, Light scattering, Physics - Atomic Physics, 010309 optics, Momentum, symbols.namesake, Hall effect, 0103 physical sciences, Physics::Atomic Physics, 010306 general physics, ComputingMilieux_MISCELLANEOUS, Physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Atomic and Molecular Physics, and Optics, Magnetic field, [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con], Classical mechanics, symbols, Atomic physics, Lorentz force, Physics - Optics, Optics (physics.optics)
Abstract

Light scattering exchanges momentum between matter and radiation, and thus induces a force on the matter. Classical light scattering is well known to be affected by a magnetic field. A specific feature, the photon Hall effect (PHE), was first predicted in multiple light scattering [1], and observed shortly afterwards [2] with typical changes in the magneto-transverse photon flux of order 10 −5 per Tesla of applied magnetic field. A Mie theory for the PHE [4] agreed quantitatively with the experiments. Given the wave number k of the incident photon flux and the magnetic field B , the PHE induces an exchange of momentum between scatterer and radiation in the magnetotransverse (”upward”) direction along B×k. A light flux of 10 4 W/m 2 incident on a micron-sized particle with a relative PHE of 10 −5 per Tesla experiences a transverse force of 10 −19 N/T, roughly equivalent to the Lorentz force on a charge e moving with a velocity of 1 m/s. The magneto-transverse acceleration for a 10µm TiO2 particle would be as small as 10 −11 m/s 2 in a field of 10 Tesla.

Published
2013
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49. Quantum vacuum magneto-optics

Author

Geert L. J. A. Rikken, Carlo Rizzo, Remy Battesti, Paul Berceau, Mathilde Fouché, Laboratoire national des champs magnétiques intenses - Toulouse (LNCMI-T), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])

Subjects
Physics, QED vacuum, Photon, 010308 nuclear & particles physics, Physics beyond the Standard Model, General Engineering, Energy Engineering and Power Technology, Inverse, 01 natural sciences, Magnetic field, [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con], Vacuum energy, Quantum mechanics, 0103 physical sciences, 010306 general physics, Magneto, Cotton–Mouton effect, ComputingMilieux_MISCELLANEOUS
Abstract

In this article we report on the recent experimental activities concerning the magneto-optics of quantum vacuum performed by our team based at the LNCMI of Toulouse. In particular, we will deal with quantum vacuum Cotton–Mouton and inverse Cotton–Mouton effects which have been predicted in the framework of Quantum electrodynamics. Finally, we will present our experiment on photon oscillations into massive particles in the presence of a magnetic field, an effect that could be a signature of physics beyond the standard model.

Published
2013

50. Observation of displacement momentum in normal and chiral dielectrics

Author

B. A. van Tiggelen and Geert L. J. A. Rikken

Subjects
Momentum, Physics, Condensed matter physics, Electric field, Quantum mechanics, Physics::Optics, General Physics and Astronomy, Momentum conservation, Dielectric, Displacement (vector), Magnetic field
Abstract

We argue that displacement currents in dielectrics are in general accompanied by mechanical momentum through total momentum conservation, quite analogous to the Einstein-de Haas effect. We report the first observation of such displacement momentum, generated by a time varying electric field in a dielectric, and by a time varying magnetic field in a chiral dielectric.

Published
2013

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