Laboratoire de Physique et d'Étude des Matériaux

Marko Kralj, Institute of Physics, Bijenička 46, Zagreb, Croatia

Sergei Kozlov — 2026-05-22T13:18:20Z

Thursday, May 28 , at 2:00 pm (Paris time) Room Holweck, building C, 1st floor, 10 rue Vauquelin, ESPCI
Epitaxial Growth of Next-Generation 2D Materials
Long before graphene gained fame in 2004, its epitaxial growth had already been realized in surface science studies focused on the adsorption and decomposition of hydrocarbons on metal substrates [1]. Surface parameters play a crucial role in the synthesis of various two-dimensional (2D) materials, including graphene, transition metal (…)

- Séminaires et présentations

Sergio Caprara, Department of Physics, University of Rome Sapienza

Sergei Kozlov — 2026-05-18T07:39:42Z

Friday, May 22, at 2:00 pm (Paris time)
Room Charpak
Shrinking Fermi Liquid and Strange Metal behavior from Charge Density Fluctuations in superconducting cuprates
I shall discuss a proposal that attributes the strange metallic behavior of cuprates to the occurrence of very slow dynamical charge density fluctuations in these systems. These excitations have indeed been detected by means of resonant inelastic X-ray scattering. The main consequence of their slow dynamics is to endow the (…)

- Séminaires et présentations

Victor Brar Department of Physics, University of Wisconsin–Madison, Madison, Wisconsin, USA

Sergei Kozlov — 2026-05-13T13:38:01Z

May 21 at 2:00 pm (Paris time) Room Charpak
Imaging charge carrier dynamics and phase transitions using scanning probe potentiometry
I will discuss how scanning tunneling potentiometry (STP) can be used to measure the electrochemical profile of current-biased graphene as the quasiparticles transition through different electronic phases. I will first describe how STP maps relate to local current density distribution of a sample. I will then demonstrate how the scanned probe tip can be (…)

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Guillaume F. Nataf GREMAN UMR7347, CNRS, University of Tours, INSA Centre Val de Loire, 37000 Tours, France

Sergei Kozlov — 2026-05-07T10:24:42Z

May 7 at 2:00 pm (Paris time) Room Charpak
Control of thermal conductivity in ferroelectric and ferroelastic materials
Since the early days of computing, hardware has evolved from mechanical to digital systems, where logic operations are performed by controlling electrons in semiconductors. However, the development of semiconductor-based chips is encountering important bottlenecks. To be disruptive, future progress is expected to be driven by different information carriers. Here, we (…)

- Séminaires et présentations

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 (…)

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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 (…)

- Séminaires et présentations