Department of Complex Matter
Jamova cesta 39, 1000 Ljubljana, Slovenia

Dynamics of Quantum matter

We explore non-equilibrium many-body dynamics in quantum systems that experience symmetry-breaking, topological, or jamming transitions. These systems encompass superconductors, charge-density wave, and magnetic materials.

Experimental Soft Matter Physics

The research is conducted within the “Light and Matter” research program. The interaction of light with matter is one of the most important fields of physics and optical processes are indispensable in many branches of modern industry.

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April 11, 2024
Dr. Dragan Mihailović, a leading researcher in the field of quantum systems at the Jožef Stefan Institute (IJS), has successfully won the third project of the European Research Council (ERC), HIMMS (High-Resolution ...
Home / Events / Seminar: Heat propagation in liquid 3He and metallic Fermi liquids

Seminar: Heat propagation in liquid 3He and metallic Fermi liquids

April 11, 2024 , 15:30 , IJS Velika Predavalnica
Speaker: Kamran Behnia (ESPCI & CNRS, Paris, France)

The normal liquid 3He conforms to Landau’s Fermi liquid picture but only at very low temperature. We have recently shown that the available experimental data can be accounted for assuming that the thermal conductivity is the sum of two contributions: one by quasi-particles (varying as the inverse of temperature) and another by a hydrodynamic sound mode (following the square root of temperature).  The first component has been known for decades. The second is zero sound in the hydrodynamic limit [2]. The importance of a short wavelength sound mode was anticipated by early works on weak crystallization [3] and 2kF rotons [4]. We will discuss its role in the transport properties of metallic Fermi liquids whose resistivity displays a quadratic temperature dependence at low T [5] and consequences for the `strange metal’ [6] problematic.

[1] K. Behnia & K. Trachenko, Nature Commun. 15, 1771 (2024).
[2] F. Albergamo et al., Phys. Rev. Lett. 99, 205301 (2007).
[3] S. A. Brazovskii, J. Exp. Theor. Phys. 41, 85 (1975).
[4] A. M. Dyugaev, J. Exp. Theor. Phys. 43, 1247 (1976).
[5] K. Behnia,  Annalen der Physik, 534, 2100588 (2022).
[6] P. W. Phillips, N. E. Hussey & P. Abbamonte, Science 377, eabh4273 (2022).