Thermodynamic properties of correlated fermions in lattices with spin-dependent disorder

TL;DR

This paper explores how spin-dependent disorder affects the thermodynamic behavior of correlated fermions in optical lattice models, revealing disorder-induced magnetic polarization and unique magnetic responses.

Contribution

It introduces a Hubbard model with spin-dependent disorder solved via dynamical mean-field theory, providing new insights into magnetic polarization effects.

Findings

Spin-dependent disorder induces magnetic polarization.

Magnetic response differs from conventional disorder.

Thermodynamic properties are comprehensively characterized.

Abstract

Motivated by the rapidly growing possibilities for experiments with ultracold atoms in optical lattices we investigate the thermodynamic properties of correlated lattice fermions in the presence of an external spin-dependent random potential. The corresponding model, a Hubbard model with spin-dependent local random potentials, is solved within dynamical mean-field theory. This allows us to present a comprehensive picture of the thermodynamic properties of this system. In particular, we show that for a fixed total number of fermions spin-dependent disorder induces a magnetic polarization. The magnetic response of the polarized system differs from that of a system with conventional disorder.