Laboratoire de Physique et d'Étude des Matériaux

Michal Šindler, FZU, Institute of Physics of the Czech Academy of Sciences, Czech Republic

Sergei Kozlov — 2026-04-11T07:31:52Z

April 16 at 2:00 pm (Paris time)
Room Charpak, entrance building, ground floor
Terahertz spectroscopy of thin NbN films
Terahertz (THz) spectroscopy offers unique access to the key properties of superconductors, such as the superconducting gap, penetration depth, quasiparticle behavior, vortex dynamics, and non-equilibrium relaxation. I will illustrate the advantages and limitations of this approach through our previous work on high-quality thin NbN films showcasing measurements from (…)

- Séminaires et présentations

Florian Le Mardelé, Laboratoire national des champs magnétiques intenses, Toulouse

Sergei Kozlov — 2026-03-27T13:39:41Z

April 3 at 2:00 pm (Paris time) Room Charpak, entrance building, ground floor
Magneto-optical spectroscopy on van-der-Waals antiferromagnets and topological semimetals
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 (…)

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Ludovica Zullo, Wuerzburg University

Sergei Kozlov — 2026-03-12T17:23:34Z

March 19 at 2:00 pm (Paris time) Room Holweck, building C, 1st floor
The power of flatness : an ab initio guide to tunable flat bands in 2D materials
In condensed matter, flatness is anything but boring : when a band's energy dispersion becomes nearly flat, electrons lose their kinetic identity and correlations take over, giving rise to exotic physics. In this talk, I will show how to design two-dimensional materials in which flat bands may be engineered and tuned through experimentally (…)

- Séminaires et présentations

Antoine Kahn, Department of Electrical and Computer Engineering, Princeton Univ., Princeton, USA

Sergei Kozlov — 2026-02-19T11:22:45Z

February 26 at 2:00 pm (Paris time) Room Holweck, building C, 1st floor
Electronic Structure of 2D Metal Halide Perovskites : Impact of Ligands on Octahedral Twists, Energy Gaps and Exciton Binding Energy
Two-dimensional (2D) halide perovskites exhibit remarkable tunability of optoelectronic properties and good environmental stability achieved through the selection of both inorganic and organic constituents. In particular, the incorporation of bifunctional ligands featuring non-ammonium (…)

- Séminaires et présentations / Accueil-une

Yannis Laplace, Laboratoire des solides irradiés, Ecole Polytechnique, Palaiseau, France

Sergei Kozlov — 2026-01-30T09:52:40Z

February 5 at 2:00 pm (Paris time)
Room Charpak, entrance building, ground floor
Surface plasmonic cavities at Terahertz frequencies : ultrasmall, chiral and more
I will present our work on the development of cavities and metamaterials operating in the Terahertz (THz) frequency range, using a surface plasmonic mechanism for light confinement. This approach enables the confinement of THz photons to volumes up to 10⁻⁸ times smaller than the free-space diffraction limit [1]. In this (…)

- Séminaires et présentations

Mikhail Feigel'man, CENN Nanocenter, Ljubljana 1000, Slovenia

Francis Cassagne — 2026-01-27T10:36:23Z

Jauary 29 at 4:30 pm (Paris time) !Unusual time !
Room Holweck, building C, 1st floor, 10 rue Vauquelin, ESPCI
Quantum breakdown of a pinned vortex glass near the superconductor-insulator transition
The interplay between disorder and vortex-vortex interactions in strongly disordered superconductors under magnetic fields produces a glassy superfluid state, characterized by strong vortex pinning without local positional order. Understanding this state is crucial, as it precedes the (…)

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Christoph Lange, TU Dortmund University

Francis Cassagne — 2026-01-22T08:19:37Z

Thursday January 22 at 2:00 pm (Paris time) Room Charpak, entrance building, ground floor, ESPCI, at LPEM in hybrid format
Frontiers in THz cavity QED : Deep-strong multi-mode coupling, subcycle nonlinearities, and diabatic switching
Dressing matter excitations with cavity photons can create novel, exotic quantum states. Ultrastrong coupling, where the ratio of vacuum Rabi frequency and carrier frequency of light, W_R/w_c, approaches unity, has enabled vacuum-field modified transport, (…)

- Séminaires et présentations / Accueil-une

seminaire 2026

Francis Cassagne — 2026-01-05T10:28:32Z

- Séminaires 2026 / Invisible

Plongée au cœur des cellules pérovskites

Francis Cassagne — 2025-12-18T08:13:27Z

1. Contexte de recherche, problématique et motivation initiale Les cellules solaires à base de pérovskites ont connu un développement spectaculaire en une décennie, atteignant des rendements comparables à ceux du silicium, avec des procédés de fabrication potentiellement moins coûteux et moins énergivores. Leur instabilité en fonctionnement reste toutefois un frein majeur à leur commercialisation. Sous l'effet de la lumière, de la chaleur ou de l'humidité, elles se dégradent, entraînant une (…)

- Actualite Scientifique / Accueil-actus

Laurent Limot, Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France

Francis Cassagne — 2025-12-15T06:53:33Z

Thursday December 18 at 11:00 am (Paris time) !Unusual time ! Room Charpak, entrance building, ground floor
Single-spin quantum sensing : A molecule-on-tip approach
Magnetometry plays a pivotal role in meeting the demands of ultra-dense storage technology and overcoming challenges associated with downscaled spin qubits. A promising approach for atomic-scale single-spin sensing involves utilizing a magnetic molecule as a spin sensor [1], although its practical realization remains in (…)

- Séminaires et présentations