Charge disorder and variations of $T_c$ in Zn-doped cuprate superconductors

TL;DR

This paper models Zn-doped cuprate superconductors as nanoscale granular systems, explaining how impurity doping affects $T_c$ and offering insights into the pseudogap phase through Josephson coupling mechanisms.

Contribution

It introduces a nanoscale granular superconductor model to interpret Zn doping effects and the pseudogap phase in cuprates, providing a new theoretical perspective.

Findings

Zn doping data can be reproduced by the granular superconductor model

Resistivity transition is explained by Josephson coupling

Provides a simple interpretation of the pseudogap phase

Abstract

Impurity doping like Zn atoms in cuprates were systematically studied to provide important information on the pseudogap phase because this process substantially reduces $T_c$ without effect $T^*$. Despite many important results and advances, the normal phase of these superconductors is still subject of a great debate. We show that the observed Zn-doped data can be reproduced by constructing a nanoscale granular superconductor whose resistivity transition is achieved by Josephson coupling, what provides also a simple interpretation to the pseudogap phase.