Flux Flow in d-Wave Superconductors: Low Temperature Universality and Scaling
We demonstrate that superclean d-wave superconductors with Δ2∞τ/EF>>1 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.
Physical Review Letters
- Pub Date:
- August 1997
- Condensed Matter - Superconductivity
- RevTex file, 4 pages, no figures, submitted to Phys. Rev. Lett., revised after referee reports