Superconductor to metal transition in overdoped cuprates

TL;DR

This paper develops a theoretical model to explain the superconductor-to-metal transition in overdoped cuprates, emphasizing the roles of d-wave pairing, flat dispersion, and disorder in the transition.

Contribution

It introduces a framework highlighting how disorder and electronic structure influence superconductivity near the quantum transition in cuprates.

Findings

Superconducting transition temperature is mainly governed by superfluid stiffness.

Disorder induces granular superconducting correlations.

The model explains the normal and superconducting state behaviors near the transition.

Abstract

We present a theoretical framework for understanding the behavior of the normal and superconducting states of overdoped cuprate high temperature superconductors in the vicinity of the doping-tuned quantum superconductor-to-metal transition. The key ingredients on which we focus are d-wave pairing, a flat antinodal dispersion, and disorder. Even for homogeneous disorder, these lead to effectively granular superconducting correlations and a superconducting transition temperature determined in large part by the superfluid stiffness rather than the pairing scale.