Dimensionality effects on non-equilibrium electronic transport in Cu nanobridges

TL;DR

This paper investigates how the size of copper nanobridges affects their electronic transport properties under non-equilibrium conditions, revealing universal scaling and electron-electron interaction effects at low temperatures.

Contribution

It demonstrates the impact of dimensionality on non-equilibrium transport in Cu nanobridges and explains the observed phenomena through electron-electron interactions in diffusive zero-dimensional systems.

Findings

Logarithmic temperature dependence of zero-bias conductance

Universal scaling behavior of differential conductance

Electron-electron interactions explain the transport phenomena

Abstract

We report on non-equilibrium electronic transport through normal-metal (Cu) nanobridges coupled to large reservoirs at low temperatures. We observe a logarithmic temperature dependence of the zero-bias conductance, as well as a universal scaling behavior of the differential conductance. Our results are explained by electron-electron interactions in diffusive metals in the zero-dimensional limit.