Zero-energy vortex bound states in noncentrosymmetric superconductors

TL;DR

This paper investigates vortex core bound states in non-centrosymmetric superconductors, revealing that zero-energy states persist under specific conditions despite mixed singlet-triplet pairing.

Contribution

It demonstrates the existence of zero-energy vortex bound states in non-centrosymmetric superconductors, extending understanding of topological states in these materials.

Findings

Zero-energy vortex bound states can exist despite singlet-triplet mixing.

Survival of zero-energy states depends on specific parameter regimes.

Analogies with chiral p-wave vortex states are established.

Abstract

We consider bound states at the vortex core of a non-centrosymmetric superconductor. We show that, despite the mixing of singlet and triplet order parameters, zero energy states survive within certain parameter space as in vortices of some chiral p-wave states.