Coulomb blockade of non-local electron transport in metallic conductors

TL;DR

This paper investigates how Coulomb interactions influence non-local electron transport in a metallic wire with two junctions, revealing complex anomalies and providing a method to test electron relaxation at low temperatures.

Contribution

It presents a theoretical analysis of Coulomb blockade effects on non-local conductance in metallic conductors, highlighting non-trivial anomalies and experimental implications.

Findings

Interaction corrections modify local and non-local conductances.

Coulomb anomalies exhibit non-trivial behavior.

Proposes experimental tests for inelastic electron relaxation.

Abstract

We consider a metallic wire coupled to two metallic electrodes via two junctions placed nearby. A bias voltage applied to one of such junctions alters the electron distribution function in the wire in the vicinity of another junction thus modifying both its noise and the Coulomb blockade correction to its conductance. We evaluate such interaction corrections to both local and non-local conductances demonstrating non-trivial Coulomb anomalies in the system under consideration. Experiments on non-local electron transport with Coulomb effects can be conveniently used to test inelastic electron relaxation in metallic conductors at low temperatures.