Quasiparticle localization in superconductors with spin-orbit scattering

TL;DR

This paper develops a theory describing how quasiparticles localize or delocalize in superconductors lacking spin rotation symmetry, with implications for experiments and related models.

Contribution

It introduces a new theoretical framework for quasiparticle localization in non-spin-rotation-invariant superconductors across different dimensions.

Findings

Existence of localized and delocalized quasiparticle phases in such superconductors.

Implications for experimental systems with broken spin symmetry.

Connections to properties of 2D random Ising models.

Abstract

We develop a theory of quasiparticle localization in superconductors in situations without spin rotation invariance. We discuss the existence, and properties of superconducting phases with localized/delocalized quasiparticle excitations in such systems in various dimensionalities. Implications for a variety of experimental systems, and to the properties of random Ising models in two dimensions, are briefly discussed.