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Statut |
Confirmé |
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Série |
SEM-EXCEP |
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Domaines |
cond-mat |
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Date |
Vendredi 3 Avril 2026 |
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Heure |
14:00 |
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Institut |
ESPCI |
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Salle |
Room Charpak, entrance building, ground floor, 10 rue Vauquelin, Paris |
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Nom de l'orateur |
Le Mardelé |
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Prenom de l'orateur |
Florian |
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Addresse email de l'orateur |
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Institution de l'orateur |
Laboratoire national des champs magnétiques intenses, Toulouse |
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Titre |
Magneto-optical spectroscopy on van-der-Waals antiferromagnets and topological semimetals |
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Résumé |
Magneto-optical spectroscopy focuses on the interaction between light and matter,with the magnetic field acting as a continuously adjustable external parameter. The magneto-optic response offers valuable information into the intrinsic properties of systems in their unperturbed states. As a historical example, Landau-level spectroscopy has provided crucial insights into the electronic band structure of semiconductors and semimetals [1]. I will illustrate this point with my recent study on the low-energy excitations of TlBiSSe, a textbook Dirac semimetal. Following this, I will highlight the important role that magneto-optic plays in the ongoing research of van der Waals magnets. Specifically, I will discuss the detection of a novel type of collective excitation, called longitudinal magnons in FePSe_{3} and FePS_{3}followed by the study of the magnetic alloy Fe_{1-x}Ni_{x}PS_{3} in which magneto-optics allows us to track precisely the evolution of the magnetic properties with respect to the alloy composition.
[1] G. Landwehr and E. I. Rashba. Landau Level Spectroscopy. ISSN. Elsevier Science, 2012. |
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Numéro de preprint arXiv |
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Commentaires |
For the Zoom link, please contact: seminaires-lpem@espci.fr |
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Fichiers attachés |
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