Pomeranchuk instabilities in multicomponent lattice systems at finite Temperature

TL;DR

This paper extends a method to detect Pomeranchuk instabilities in lattice systems, incorporating finite temperature effects and multiband considerations, enabling analysis of critical temperatures and complex materials.

Contribution

The paper introduces an extended method for Pomeranchuk instability detection that includes finite temperature and multiband effects, applicable to realistic material models.

Findings

Allows computation of critical temperatures based on interaction and density.

Applicable to multiband systems with spin or color degrees of freedom.

Provides a tool for studying Fermi liquid to nematic transitions.

Abstract

In the present paper we extend the method to detect Pomeranchuk instabilities in lattice systems developed in previous works to study more general situations. The main result presented here is the extension of the method to include finite temperature effects, which allows to compute critical temperatures as a function of interaction strengths and density of carriers. Furthermore, it can be applied to multiband problems which would be relevant to study systems with spin/color degrees of freedom. Altogether, the present extended version provides a potentially powerful technique to investigate microscopic realistic models relevant to e.g. the Fermi liquid to nematic transition extensively studied in connection with different materials such as cuprates, ruthenates, etc.