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

N. B. Kopnin

doi:10.1103/PhysRevB.57.11775

← Back to search

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

N. B. Kopnin

DOI 10.1103/PhysRevB.57.11775 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

We predict a resonant microwave absorption on collective vortex modes in a superclean d-wave superconductor at low temperatures. 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. The characteristic resonant frequency is larger than the cyclotron frequency ωc but lower than the Caroli-de Gennes-Matricon minigap Δ2/EF; it has a H dependence on the magnetic field and decreases down to ωc with increasing temperature. We calculate the vortex mass as a response to a slow acceleration. This mass is equal to the mass of electrons inside the vortex core region with the area of the order of ξ2Hc2/H; it increases with temperature and diverges for H→0. We discuss the universal flux-flow regime predicted by Kopnin and Volovik [Phys. Rev. Lett. 79, 1377 (1997)] and show that it exists in a broader temperature range than has been originally found.