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TZID:Europe/Paris
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260310T140000
DTEND;TZID=Europe/Paris:20260310T150000
DTSTAMP:20260409T193939
CREATED:20260302T100517Z
LAST-MODIFIED:20260303T092931Z
UID:11888-1773151200-1773154800@fermi.univ-tlse3.fr
SUMMARY:TBA. - (Yasmina BEDDAR / LPT / Seminar). - 10/03/2026\, 14H
DESCRIPTION:Séminaire LPT \nYasmina BEDDAR\, CNRS (DR14) \nSeminar LPT\, 10/03/2026\, 14H\, 3R4\, salle de conférence \n\n\n\n 
URL:https://fermi.univ-tlse3.fr/event/tba-yasmina-beddar-lpt-seminar-10-03-2026-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LPT,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260312T140000
DTEND;TZID=Europe/Paris:20260312T153000
DTSTAMP:20260409T193939
CREATED:20260311T090741Z
LAST-MODIFIED:20260311T090741Z
UID:12024-1773324000-1773329400@fermi.univ-tlse3.fr
SUMMARY:Investigating field-induced magnetic phases in TbB4. - (Fabienne Duc /  LNCMI / Seminar). - 12/03/2026\, 14H
DESCRIPTION:Seminar LNCMI \nFabienne Duc\, LNCMI-Toulouse \nSeminar LNCMI\, 12/03/2026\, 14H\, LNCMI-Toulouse \nAbstract\nNeutron diffraction in high magnetic fields offers a powerful and complementary approach to uncover exotic magnetic phases in frustrated systems\, providing direct insight into magnetic structures and their field-induced transformations. \nThis seminar will focus on neutron diffraction studies of TbB4\, a tetraboride compound that exhibits a rich phase diagram under applied magnetic fields. \nUsing the 2 K/40 T pulsed-field cryomagnet\, developed through collaboration between LNCMI-Toulouse\, ILL-Grenoble\, and CEA-Grenoble\, we demonstrate how high-field neutron diffraction enables the investigation of complex magnetic structures. \nThe seminar will highlight the technical progress achieved in performing such experiments\, as well as the improvements required for studying materials with small magnetic moments. \nLien Zoom : https://univ-grenoble-alpes-fr.zoom.us/j/94228207316?pwd=khTdznxeFy1ZUYkYftQ0QSox6Fz3iK.1
URL:https://fermi.univ-tlse3.fr/event/investigating-field-induced-magnetic-phases-in-tbb4-fabienne-duc-lncmi-seminar-12-03-2026-14h/
LOCATION:Salle de seminaire du LNCMI\, Champs Magnétiques Pulsés\, 143 avenue de Rangueil\, Toulouse\, France
CATEGORIES:Events,LNCMI,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260317T140000
DTEND;TZID=Europe/Paris:20260317T150000
DTSTAMP:20260409T193939
CREATED:20260310T201733Z
LAST-MODIFIED:20260311T091526Z
UID:11839-1773756000-1773759600@fermi.univ-tlse3.fr
SUMMARY:Ordres concurrents dans les systèmes à plusieurs électrons : une perspective de groupe de renormalisation. - (Kilian Fraboulet / LPT / Seminar). - 17/03/2026\, 14H
DESCRIPTION:Séminaire LPT \nKilian Fraboulet  MPI-FKF\, Stuttgart \nSeminar LPT\, 17/03/2026\, 14H\, 3R4\, salle de conférence \nSummary\nThe renormalization group is an established approach to study quantum many-body systems\, and this applies especially to one of its modern implementations known as functional renormalization group (FRG). In particular\, the FRG constitutes a flexible and unbiased tool for the study of competing orders. In this talk\, I will outline recent progress in this direction for correlated electron systems. For this\, I will first discuss the competition between antiferromagnetism\, charge density waves and superconductivity in the 2D Hubbard model\, thus making a connection with cuprate superconductors. The special role of bosonization methods will also be emphasized along the way. I will also show how the FRG can be efficiently combined with dynamical mean-field theory to treat d-wave superconductivity and with density functional theory to study altermagnetism. As a next step\, I will increase the complexity of the model including non-local interactions and discuss unconventional superconductivity in an extended Hubbard model with a connection to moiré materials. Special consideration will also be given to the treatment of retarded interactions with electron-phonon couplings. Finally\, I will also highlight recent FRG studies of quantum criticality in Dirac materials\, with a connection to graphene. \n\n\n\n 
URL:https://fermi.univ-tlse3.fr/event/ordres-concurrents-dans-les-systemes-a-plusieurs-electrons-une-perspective-de-groupe-de-renormalisation-kilian-fraboulet-lpt-seminar-17-03-20265-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LPT,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260319T110000
DTEND;TZID=Europe/Paris:20260319T123000
DTSTAMP:20260409T193939
CREATED:20260316T092508Z
LAST-MODIFIED:20260317T142028Z
UID:12028-1773918000-1773923400@fermi.univ-tlse3.fr
SUMMARY:Les capacités d’un microscope révélées par Fourier.  - (Emmanuel Soubiés / CEMES /  Seminar). - 19/03/2026\, 11 H
DESCRIPTION:Séminaire du Jeudi\, CEMES \nEmmanuel Soubiés IRIT\n \nCEMES\, 19/03/2026\, 11H \nRésumé :\nDans cet exposé\, je commencerai par introduire et illustrer un outil fondamental du traitement du signal et de l’image : la transformée de Fourier. Cet outil permet notamment d’analyser les limites de performance de systèmes d’imagerie\, autrement dit\, jusqu’où un système d’imagerie peut voir ? Dans ce contexte je m’intéresserai à deux techniques de microscopie :\n– La microscopie SIM (Structured Illumination Microscopy)\, une technique de microscopie de fluorescence qui permet de doubler la résolution des microscopes conventionnels et de dépasser la limite de diffraction. Nous verrons comment l’analyse de Fourier permet de comprendre de manière intuitive l’origine de ce gain de résolution.\n– La microscopie ISOM (Interference Scanning Optical Probe Microscopy)\, développée par Wolfgang Bacsa au CEMES. Contrairement à la SIM\, cette technique ne nécessite pas de marquage fluorescent. Je présenterai les résultats récents issus de notre collaboration\, dans lesquels nous proposons une étude théorique de la résolution atteignable par ISOM à l’aide d’une analyse de Fourier. Ces travaux mettent en évidence le potentiel de cette approche et ouvrent de belles perspectives. \nDans les deux cas\, j’évoquerai les problèmes mathématiques posés par la reconstruction des images\, et montrerai comment l’analyse de Fourier permet aussi d’orienter la conception des algorithmes.
URL:https://fermi.univ-tlse3.fr/event/les-capacites-dun-microscope-revelees-par-fourier-emmanuel-soubies-cemes-seminar-19-03-2026-11-h/
LOCATION:salle de conférence du CEMES\, CEMES - 29\, rue Jeanne Marvig BP 94347\, Toulouse\, 31055\, France
CATEGORIES:CEMES,Events,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260319T140000
DTEND;TZID=Europe/Paris:20260319T153000
DTSTAMP:20260409T193939
CREATED:20260316T141939Z
LAST-MODIFIED:20260317T142208Z
UID:12049-1773928800-1773934200@fermi.univ-tlse3.fr
SUMMARY:Magnetoelastic effects in the 2D limit enhanced by intense magnetic fields in CrOC. - (Tristan Riccardi /  LNCMI / Seminar). - 19/03/2026\, 14H
DESCRIPTION:Seminar LNCMI \nTristan Riccardi\, LNCMI-Grenoble \nSeminar LNCMI\, 19/03/2026\, 14H\, LNCMI\, Salle Pauthenet \nAbstract\nCrOCl is a van der Waals magnet featuring a rich phase diagram [1\,2] related to its low-symmetry structure\, structural phase transitions\, and a subtle competition of interactions potentially leading to magnetic frustration. In a previously published work [3]\, we showed how\, exploiting the strong magneoelastic coupling in the material\, we can use Raman scattering spectroscopy\, performed at variable temperature and magnetic field\, to decipher the magnetic phase diagram of bulk CrOCl. \n Here we extend this work to the investigation of thin flakes of CrOCl down to the single layer. While previous works on thin layers have used transport techniques and did not show a clear evolution of the properties with the thickness [4]\, we were able to highlight strong effects of the coupling of the lattice with the external field\, leading to zone-folded phonons (produced by the magnetic supercell) or blue/red-shifts of the phonon energies at the metamagnetic transitions to build a phase diagram of the material at varying thickness. Moreover\, we were able to demonstrate the existence of a strong magnetostriction effect at high magnetic field (up to 30T)\, present for all thicknesses down to the monolayer. \nLien Zoom : https://univ-grenoble-alpes-fr.zoom.us/j/94228207316?pwd=khTdznxeFy1ZUYkYftQ0QSox6Fz3iK.1\n\nReferences: \n[1] P. G. Reuvekamp. Investigation into the magnetic and the structural properties of two low-dimensional\nantiferromagnets TiPO4 and CrOCl. 2014 \n[2] P. Gu & al. Magnetic phase transitions and magnetoelastic coupling in a two- dimensional stripy\nantiferromagnet. Nano Letters. 22\, 1233–1241. 2022 \n[3] A. Pawbake & al. Magnetic Phases and Zone-Folded Phonons in a Frustrated van der Waals Magnet.\nACS Nano. 19\, 26\, 23693–23702. 2025 \n[4] M. Zhang & al. Spin-Lattice Coupled Metamagnetism in Frustrated van der Waals Magnet CrOCl. Small.\n19\, 2300964. 2023
URL:https://fermi.univ-tlse3.fr/event/magnetoelastic-effects-in-the-2d-limit-enhanced-by-intense-magnetic-fields-in-croc-tristan-riccardi-lncmi-seminar-19-03-2026-14h/
CATEGORIES:Events,LNCMI,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260326T110000
DTEND;TZID=Europe/Paris:20260326T123000
DTSTAMP:20260409T193939
CREATED:20260325T081447Z
LAST-MODIFIED:20260325T084639Z
UID:12026-1774522800-1774528200@fermi.univ-tlse3.fr
SUMMARY:Quantum empty waves revisited. - (Thomas Durt / LCAR / Seminar). - 26/03/2026\, 11H
DESCRIPTION:Séminaire LCAR \nThomas Durt\,  Ecole Centrale Mediterranee\, Institut Fresnel\, Marseille \nSummary\nThe idea of empty waves can be traced back to Einstein who faced the following problem when he developed his theory of the photon: if the localized particle (the photon) carries all the energy and momentum\, how can the wave (here the Maxwell wave) be considered real? A possible way to answer this question is to consider the wave as an empty wave (what Einstein called Gespenterfelder -ghost field-)\, which corresponds to the so-called pilot-wave introduced by L. de Broglie in a quantum framework in 1926\, one century ago. \nIn our talk we will discuss these questions and present an experimental proposal aimed at putting into evidence the objective existence and the reality of such empty waves.
URL:https://fermi.univ-tlse3.fr/event/quantum-empty-waves-revisited-thomas-durt-lcar-seminar-26-03-2026-11h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LCAR,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260326T140000
DTEND;TZID=Europe/Paris:20260326T153000
DTSTAMP:20260409T193939
CREATED:20260325T073831Z
LAST-MODIFIED:20260325T084651Z
UID:12054-1774533600-1774539000@fermi.univ-tlse3.fr
SUMMARY:Terahertz Magnon-Polariton Control Using a Tunable Liquid Crystal Cavity. - (Dmitriy Yavorskiy /  LNCMI / Seminar). - 26/03/2026\, 14H
DESCRIPTION:Seminar LNCMI \nDmitriy Yavorskiy\, Polish Academy of Sciences in Warsaw \nSeminar LNCMI\, 26/03/2026\, 14H\, LNCMI\, Salle Pauthenet \nAbstract\nIn the strong light–matter coupling regime\, polariton modes emerge as hybrid excitations combining electromagnetic cavity modes and material resonances. While magnon–polaritons in ferromagnets have been extensively explored at microwave frequencies\, antiferromagnetic systems enable access to the terahertz (THz) range\, where strong coupling can be achieved using Fabry–Perot cavities. However\, antiferromagnetic magnons are typically tunable only via temperature or high magnetic fields\, which limits dynamic control of magnon–polariton states. Here we demonstrate remote electrical control of antiferromagnetic magnon–polaritons by combining an antiferromagnetic crystal with an electrically tunable photonic environment. The system consists of a nickel oxide (NiO) slab\, chosen for its low spin damping and temperature-dependent resonance frequency near 1.0 THz above room temperature\, placed adjacent to a nematic liquid-crystal cell and separated by a controlled gap of approximately 2.5 mm. The magnon frequency is tuned via the NiO temperature\, while an applied electric field reorients the liquid crystal\, modifying the cavity-mode frequencies and spatial field distributions. Using terahertz time-domain spectroscopy\, we measure reflection spectra as functions of temperature and applied voltage and observe voltage-controlled avoided crossings between cavity modes and magnons\, as well as changes in the magnon–photon coupling strength. These results demonstrate remote electrical control of antiferromagnetic magnon–polariton states at room temperature without direct physical contact between the magnetic material and the electrically active element. \nLien Zoom : https://univ-grenoble-alpes-fr.zoom.us/j/94228207316?pwd=khTdznxeFy1ZUYkYftQ0QSox6Fz3iK.1 \nReferences:\n[1] D. Yavorskiy et al\, ACS Photonics 12\, 5c01879 (2025)
URL:https://fermi.univ-tlse3.fr/event/terahertz-magnon-polariton-control-using-a-tunable-liquid-crystal-cavity-dmitriy-yavorskiy-lncmi-seminar-26-03-2026-14h/
CATEGORIES:Events,LNCMI,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260327T110000
DTEND;TZID=Europe/Paris:20260327T123000
DTSTAMP:20260409T193939
CREATED:20260324T084511Z
LAST-MODIFIED:20260325T084659Z
UID:12057-1774609200-1774614600@fermi.univ-tlse3.fr
SUMMARY:Scaling up matter-wave interferometry: Towards next-generation quantum sensors. - (Alexandre Gauguet/ Seminar / SFP). - 27/03/2026\, 11H
DESCRIPTION:Séminaire SFP \nAlexandre Gauguet LCAR\, Salle de Conférence\, Bât. 3R4 \nAffiche presentation séminaire SFP\, Alexandre Gauguet \n 
URL:https://fermi.univ-tlse3.fr/event/scaling-up-matter-wave-interferometry-towards-next-generation-quantum-sensors-alexandre-gauguet-seminar-sfp-27-03-2026-11h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,Seminars,SFP / SFC
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260331T140000
DTEND;TZID=Europe/Paris:20260331T153000
DTSTAMP:20260409T193939
CREATED:20260330T073149Z
LAST-MODIFIED:20260330T122000Z
UID:12031-1774965600-1774971000@fermi.univ-tlse3.fr
SUMMARY:Hall effect in quasi-1D interacting systems. - (Thierry Giamarchi / LPT / Seminar). -31/03/2026\, 14H
DESCRIPTION:Séminaire LPT \nThierry Giamarchi (Université de Genève) \nSeminar LPT\, 31/03/2026\, 14H\, 3R4\, salle de conférence \nSummary\nHall effect is one of the most central measures in condensed matter systems. In the most naïve semi-classical theories\, it gives access to the number of carriers. We know however that this vision is way too simple and for non-interacting systems the Hall effect has been beautifully connected to the curvature of the Fermi surface and to topological invariants. However\, and despite severe efforts\, understanding the Hall effect for interacting systems remain an ongoing challenge. \nI will show in this talk how one can compute the Hall effect for coupled 1D structures such as ladders\, and how using numerical approaches one can predict at large tunnelling between the legs of the latter or large interactions a universal behavior of the Hall coefficient for an interacting ladder.. This prediction will be successfully compared with recent experiments in systems with synthetic gauge fields and synthetic dimensions.. \nI will also discuss how in the opposite limit of small tunnelling\, field theory methods such as bosonisation allow to compute the Hall coefficient and related it to the charge stiffness of the system in the absence of a magnetic field.
URL:https://fermi.univ-tlse3.fr/event/tba-thierry-giamarchi-lpt-seminar-31-03-2026-14h/
LOCATION:Salle de conférence\, Bâtiment 3R4
CATEGORIES:Events,LPT,Seminars
END:VEVENT
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