Suppression of $\bbox{T_c}$ in superconducting amorphous wires

TL;DR

This paper develops a theoretical model to explain the suppression of the superconducting transition temperature, $T_c$, in amorphous wires, accounting for Coulomb repulsion and contact attraction, aligning with recent experimental observations.

Contribution

It introduces a new theory that accurately predicts $T_c$ suppression in amorphous superconducting wires considering Coulomb interactions and contact effects.

Findings

The theory matches experimental data on $T_c$ suppression.

Coulomb repulsion's role is quantitatively analyzed.

Contact attraction influences $T_c$ in amorphous wires.

Abstract

The suppression of the mean field temperature of the superconducting transition, $T_c$, in homogeneous amorphous wires is studied. We develop a theory that gives $T_c$ in situations when the dynamically enhanced Coulomb repulsion competes with the contact attraction. The theory accurately describes recent experiments on $T_c$--suppression in superconducting wires, after a procedure that minimizes the role of nonuniversal mechanisms influencing $T_c$ is applied.