Superconductor--insulator transition in d-wave superconductors

TL;DR

This paper investigates the compatibility of d-wave symmetry with localized states in high-temperature superconductors, revealing a reentrant superconducting phase under strong disorder conditions.

Contribution

It demonstrates the possibility of a superconductor-insulator transition with d-wave pairing symmetry in disordered high-Tc superconductors.

Findings

Reentrant superconductivity observed in strongly disordered phases

Compatibility of d-wave symmetry with localized states in the normal phase

Implications for understanding the superconductor-insulator transition

Abstract

We address the question of whether an anisotropic gap $d_{x^2-y^2}$ symmetry is compatible with localized states in the normal phase. The issue is important in high $T_c$ superconductors where a superconductor to insulator transition is observed in the underdoped regime, together with a number of experiments that support $d$-wave pairing. We find a reentrant behavior of superconductivity in the strongly disorder phase.