Coulomb Drag in Double Layers with Correlated Disorder

TL;DR

This paper investigates how correlated disorder between layers enhances Coulomb drag in double-layer electron systems, providing new insights and experimental suggestions for observing this effect.

Contribution

It introduces the impact of correlated impurity potentials on Coulomb drag, revealing significant enhancements in the diffusive regime and proposing experimental conditions.

Findings

Drag is considerably enhanced with strongly correlated potentials.

Correlated disorder effects are significant in the diffusive regime.

Experimental conditions for observing the effect are discussed.

Abstract

We study the effect of correlations between impurity potentials in different layers on the Coulomb drag in a double-layer electron system. It is found that for strongly correlated potentials the drag in the diffusive regime is considerably enhanced as compared to conventional predictions. The appropriate experimental conditions are discussed, and the new experiments are suggested.