Disorder- and correlation-driven metal-insulator transitions

TL;DR

This paper investigates how disorder and electron correlations induce metal-insulator transitions using the Anderson-Hubbard model, deriving a phase diagram for various temperatures with a mean-field approach.

Contribution

It presents a comprehensive phase diagram for disorder- and correlation-driven transitions within the Anderson-Hubbard model at different temperatures.

Findings

Disorder and correlations can independently or jointly induce metal-insulator transitions.

The phase diagram maps the transition boundaries at zero and finite temperatures.

A mean-field approach effectively captures the transition phenomena.

Abstract

Metal-insulator transitions driven by disorder (Delta) and/or by electron correlations (U) are investigated within the Anderson-Hubbard model with local binary-alloy disorder using a simple but consistent mean-field approach. The Delta-U phase diagram is derived and discussed for T=0 and finite temperatures.