Domain walls in chiral p-wave superconductors: Quasiparticle spectrum and dynamics

TL;DR

This paper microscopically analyzes the quasiparticle spectrum, and calculates the viscous friction and effective mass of domain walls in chiral p-wave superconductors, revealing how quasiparticle transitions influence domain wall dynamics.

Contribution

It provides a detailed microscopic calculation of domain wall viscosity and inertia, including quasiparticle spectrum analysis with arbitrary phase differences.

Findings

Domain wall viscosity and inertia depend on quasiparticle transitions.

Quasiparticle spectrum analysis includes bound and scattering states.

Results inform understanding of domain wall dynamics in p-wave superconductors.

Abstract

We calculate microscopically the viscous friction coefficient and the effective mass of domain walls separating regions of opposite chirality in p-wave superconductors with k_x\pm ik_y order parameter. The domain wall viscosity and inertia are determined by the transitions between different Bogoliubov quasiparticle states induced by the domain wall motion. As a by-product, we present a detailed analysis of the quasiparticle spectrum, both bound and scattering, in the presence of a general domain wall with an arbitrary phase difference between the domains.