Superfluid transition in quasi-two-dimensional disordered dipolar Fermi gases

TL;DR

This paper studies how weak disorder affects superfluid transition temperatures in quasi-two-dimensional dipolar Fermi gases, revealing that disorder can significantly increase the transition temperature in weakly interacting regimes.

Contribution

It demonstrates that weak disorder can enhance the superfluid transition temperature in quasi-2D dipolar Fermi gases, challenging the traditional Anderson theorem.

Findings

Disorder increases transition temperature in weakly interacting regime.

Effect diminishes with stronger intercomponent interactions.

In strongly interacting regime, disorder has minimal impact.

Abstract

We investigate the effect of weak disorder on the superfluid properties of two-component quasi-two-dimensional dipolar Fermi gases. The dipole-dipole interaction amplitude is momentum dependent, which violates the Anderson theorem claiming that the weak disorder has practically no influence on the superfluid transition temperature in the weakly interacting regime. We find that for dipolar fermions the transition temperature in this regime can be strongly increased by the disorder like in the purely two-dimensional case. However, the effect becomes smaller with increasing the intercomponent fermion-fermion interaction, and in the strongly interacting regime the superfluid transition temperature in the weak disorder becomes very close to that in the absence of disorder.