The magnetic field driven superconductor-metal transition in disordered hole-overdoped cuprates

TL;DR

This study uses theoretical modeling to investigate how disorder and magnetic fields induce a superconductor-metal transition in hole-overdoped cuprates, revealing persistent pairing and vortex behavior changes.

Contribution

It provides a detailed analysis of the effects of disorder and magnetic fields on the superconductor-metal transition in cuprates using Bogoliubov-de Gennes equations.

Findings

Granular Cooper pairing persists above critical field in disordered systems.

Vortices are attracted to weak pairing regions, affecting local density of states.

Zero-bias peaks in vortex cores disappear at moderate disorder.

Abstract

By solving the Bogoliubov-de Gennes equations for a $d$-wave superconductor, we explore how the interplay between disorder and the orbital depairing of an external magnetic field influences the superconductor-metal transition of the hole-overdoped cuprates. For highly disordered systems, we find granular Cooper paring to persist above the critical field where the superfluid stiffness goes to zero. We also show that because the vortices are attracted to regions where the superconducting pairing is already weak, the Caroli-de Gennes-Matricon zero-bias peak in the local density of states at the vortex cores disappears already at moderate disorder.