Thermal resistivity and hydrodynamics of the degenerate electron fluid in antimony - Sorbonne Université
Journal Articles Nature Communications Year : 2021

Thermal resistivity and hydrodynamics of the degenerate electron fluid in antimony

Abstract

Detecting hydrodynamic fingerprints in the flow of electrons in solids constitutes a dynamic field of investigation in contemporary condensed matter physics. Most attention has been focused on the regime near the degeneracy temperature when the thermal velocity can present a spatially modulated profile. Here, we report on the observation of a hydrodynamic feature in the flow of quasi-ballistic degenerate electrons in bulk antimony. By scrutinizing the temperature dependence of thermal and electric resistivities, we detect a size-dependent departure from the Wiedemann-Franz law, unexpected in the momentum-relaxing picture of transport. This observation finds a natural explanation in the hydrodynamic picture, where upon warming, momentum-conserving collisions reduce quadratically in temperature both viscosity and thermal diffusivity. This effect has been established theoretically and experimentally in normal-state liquid 3He. The comparison of electrons in antimony and fermions in 3He paves the way to a quantification of momentum-conserving fermion-fermion collision rate in different Fermi liquids.
Fichier principal
Vignette du fichier
s41467-020-20420-9.pdf (1.41 Mo) Télécharger le fichier
Origin Publication funded by an institution

Dates and versions

hal-03110596 , version 1 (14-01-2021)

Identifiers

Cite

Alexandre Jaoui, Benoît Fauqué, Kamran Behnia. Thermal resistivity and hydrodynamics of the degenerate electron fluid in antimony. Nature Communications, 2021, 12 (1), pp.195. ⟨10.1038/s41467-020-20420-9⟩. ⟨hal-03110596⟩
75 View
36 Download

Altmetric

Share

More