Effects of randomness on the critical temperature in quasi-two-dimensional organic superconductors

TL;DR

This paper investigates how non-magnetic disorder affects the critical temperature in quasi-two-dimensional organic superconductors, showing that disorder suppresses T_c but cannot fully destroy superconductivity, aligning with experimental data.

Contribution

It introduces a model analyzing the impact of interlayer Josephson coupling disorder on T_c, revealing a quasi-linear suppression consistent with experiments.

Findings

Disorder causes a smooth decrease in T_c.

Superconductivity persists even at high disorder levels.

Model aligns well with experimental observations.

Abstract

The effects of non-magnetic disorder on the critical temperature T_c of organic weak-linked layered superconductors with singlet in-plane pairing are considered. A randomness in the interlayer Josephson coupling is shown to destroy phase coherence between the layers and T_c suppresses smoothly in a large extent of the disorder strength. Nevertheless the disorder of arbitrarily high strength can not destroy completely the superconducting phase. The obtained quasi-linear decrease of the critical temperature with increasing disorder strength is in good agreement with experimental measurements.