Resonant absorption at the vortex-core states in d-wave superconductors

TL;DR

This paper predicts resonant microwave absorption due to vortex core states in superclean d-wave superconductors, revealing new collective vortex modes and calculating vortex mass responses at various temperatures.

Contribution

It introduces the concept of resonant absorption at vortex core states and provides calculations of vortex mass and collective modes in d-wave superconductors.

Findings

Resonant microwave absorption at vortex modes predicted.

Vortex mass response calculated for different temperatures.

Discussion of the universal flux-flow regime.

Abstract

We predict a resonant microwave absorption on collective vortex modes in a superclean d-wave superconductor. Energies of the collective modes are multiples of the distance between the exact quantum levels of bound states in the vortex core at lower temperatures and involve delocalized states for higher temperatures. We calculate the vortex mass in a d-wave superconductor as a response to a slow acceleration of the vortex. The universal flux-flow regime predicted by N. Kopnin and G. Volovik [Phys. Rev. Lett. 79, 1377 (1997)] is discussed in more detail.