Supercurrent in a mesoscopic proximity wire

TL;DR

This paper explains the temperature dependence of supercurrent in disordered mesoscopic wires using conventional diffusive superconductor theory and proposes a new SQUID-like structure for further experiments.

Contribution

It shows that the observed supercurrent behavior aligns with established diffusive superconductor models and introduces a novel SQUID-like device for future studies.

Findings

Excellent agreement between theory and experiment

Supercurrent scaling explained by diffusive superconductor theory

Proposed a new SQUID-like structure for experiments

Abstract

Recent experiments on the proximity induced supercurrent in mesoscopic normal wires revealed a surprising temperature dependence. They suggest clean-limit behavior although the wires are strongly disordered. We demonstrate that this unexpected scaling is actually contained in the conventional description of diffusive superconductors and find excellent agreement with the experimental results. In addition we propose a SQUID-like proximity structure for further experimental investigations of the effects in question.