Thermal conductivity of a two-dimensional electron gas with Coulomb interaction

TL;DR

This paper shows that in a two-dimensional ballistic electron gas, Coulomb interactions cause a unique temperature dependence of thermal conductivity, deviating from standard Fermi liquid behavior due to forward scattering effects.

Contribution

It introduces a novel theoretical prediction of a (T ln T)^{-1} temperature dependence of thermal conductivity caused by Coulomb interactions in 2D electron gases.

Findings

Thermal conductivity exhibits a (T ln T)^{-1} dependence at low temperatures.

Forward electron-electron scattering suppresses thermal conductivity.

Deviation from conventional Fermi liquid behavior is demonstrated.

Abstract

We demonstrate that forward electron-electron scattering due to Coulomb interation in a two-dimensional ballistic electron gas leads to the (T\ln {T})^{-1} temperature dependence of the thermal conductivity, which is logarithmically suppressed compared to the usual Fermi liquid behaviour.