Vortex Core Structure in Multilayered Rashba Superconductors

TL;DR

This study investigates the electronic vortex core structure in bilayer Rashba superconductors, revealing unique features influenced by layer-dependent spin-orbit coupling and pair-density wave states.

Contribution

It provides a numerical analysis of vortex core structures considering local inversion symmetry breaking and spin-orbit effects in bilayer superconductors.

Findings

Distinct vortex core profiles in pair-density wave states

Influence of Rashba spin-orbit coupling on quasiparticle states

Characterization of spatially modulated superconducting phases

Abstract

We numerically study the electronic structure of a single vortex in two dimensional superconducting bilayer systems within the range of the mean-field theory. The lack of local inversion symmetry in the system is taken into account through the layer dependent Rashba spin-orbit coupling. The spatial profiles of the pair potential and the local quasiparticle density of states are calculated in the clean spin-singlet superconductor on the basis of the quasiclassical theory. In particular, we discuss the characteristic core structure in the pair-density wave state, which is spatially modulated exotic superconducting phase in a high magnetic field.