Flux-flow in d-wave superconductors: Low temperature universality and scaling

TL;DR

This paper reveals universal flux-flow behavior in superclean d-wave superconductors at low temperatures, showing that both dissipative and transverse conductivities approach universal values due to Landau damping effects.

Contribution

It introduces a novel vortex dynamics regime in superclean d-wave superconductors with universal flux-flow conductivity at low temperatures.

Findings

Universal flux-flow conductivity in superclean limit.

Landau damping explains finite dissipation.

Scaling law in moderately clean regime.

Abstract

We demonstrate that superclean d-wave superconductors display a novel type of vortex dynamics: At low temperatures, both dissipative and transverse components of the flux-flow conductivity are found to approach universal values even in the limit of infinite relaxation time. A finite dissipation in the superclean limit is explained in terms of the Landau damping on zero-frequency vortex modes which appear due to minigap nodes in the bound-state spectrum in the vortex core. In the moderately clean regime the scaling law at low T and low field is obtained.