Emergence of Non-Axisymmetric Vortex in Strong-Coupling Chiral p-Wave Superconductor

TL;DR

This paper investigates how strong-coupling effects influence vortex structures in a 2D chiral p-wave superconductor, revealing the metastable existence of non-axisymmetric vortices through self-consistent calculations.

Contribution

It introduces a self-consistent approach combining Eilenberger and Eliashberg equations to study vortex structures under strong coupling in chiral p-wave superconductors, highlighting the emergence of non-axisymmetric vortices.

Findings

Non-axisymmetric vortices can metastably exist in certain conditions.

Strong-coupling effects significantly alter vortex configurations.

Self-consistent calculations reveal new vortex states.

Abstract

We studied strong-coupling effect upon an isolated vortex in a two-dimensional chiral p-wave superconductor. We solved the Eilenberger equation for the quasiclassical Green's functions and the Eliashberg equation with single mode Einstein boson self-consistently. We calculated the free-energy of each obtained vortex, and found that a non-axisymmetric vortex metastably exists in some situation.