Disorder-Driven Non-Fermi Liquid Behavior of Correlated Electrons

TL;DR

This paper reviews how quenched disorder combined with strong electronic correlations can cause deviations from Fermi-liquid behavior in strongly correlated metals, highlighting experimental observations and theoretical explanations.

Contribution

It provides a comprehensive overview of disorder-driven non-Fermi-liquid phenomena, integrating experimental data and theoretical models in a unified framework.

Findings

Disorder and correlations lead to non-Fermi-liquid behavior in metals.

Experimental examples show systematic deviations from Fermi-liquid theory.

Theoretical scenarios attempt to explain the microscopic origins of anomalies.

Abstract

Systematic deviations from standard Fermi-liquid behavior have been widely observed and documented in several classes of strongly correlated metals. For many of these systems, mounting evidence is emerging that the anomalous behavior is most likely triggered by the interplay of quenched disorder and strong electronic correlations. In this review, we present a broad overview of such disorder-driven non-Fermi-liquid behavior, and discuss various examples where the anomalies have been studied in detail. We describe both their phenomenological aspects as observed in experiment, and the current theoretical scenarios that attempt to unravel their microscopic origin.