10-12 June 2025
BITP & Zoom
Europe/Kiev timezone

Viscoelastic response and anisotropic hydrodynamics in Weyl semimetals

11 Jun 2025, 10:20
20m
BITP & Zoom

BITP & Zoom

14b Metrolohichna str., Kyiv, Ukraine & Online
Oral talk Condensed Matter and Statistical Theory of Many-body Systems Condensed Matter and Statistical Theory of Many-body Systems

Speaker

Arsen Herasymchuk (Bogolyubov Institute for Theoretical Physics)

Description

We study viscoelastic response in Weyl semimetals with broken time-reversal symmetry. The principal finding is that topology and anisotropy of the Fermi surface are manifested in the viscoelasticity tensor of the electron fluid. In the dynamic (interband) part of this tensor, the anisotropy leads to a qualitatively different, compared with isotropic models, scaling with frequency and the Fermi energy. The components of the viscosity tensor determined by the Fermi-surface properties agree in the Kubo and kinetic formalisms; the latter, however, misses the anomalous Hall viscosity originating from filled states below the Fermi surface. The anisotropy of the dispersion relation is also manifested in the acceleration and relaxation terms of the hydrodynamic equations providing means to probe the anisotropy in transport experiments.

Primary author

Arsen Herasymchuk (Bogolyubov Institute for Theoretical Physics)

Co-authors

Prof. Eduard Gorbar (Taras Shevchenko National University of Kyiv; Bogolyubov Institute for Theoretical Physics) Prof. Pavlo Sukhachov (Department of Physics and Astronomy, University of Missouri)

Presentation Materials