Magnetic field dependence of the penetration depth of d-wave superconductors with strong isolated impurities

TL;DR

This paper investigates how an external magnetic field influences the low-temperature penetration depth in d-wave superconductors with strong isolated impurities, revealing suppression of the impurity-induced upturn.

Contribution

It provides a theoretical calculation of magnetic field effects on impurity-induced penetration depth anomalies in d-wave superconductors.

Findings

Magnetic field suppresses the low-temperature upturn in penetration depth caused by impurities.

The study offers insights into impurity effects under external magnetic fields in unconventional superconductors.

Results help interpret experimental data on magnetic field dependence of penetration depth.

Abstract

A d-wave superconductor with isolated strong non-magnetic impurities should exhibit an upturn in the penetration depth at low temperatures. Here we calculate how an external magnetic field supresses this effect.