Resonant absorption at the vortex-core states in d-wave superconductors
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.
- Publication:
-
Physical Review B
- Pub Date:
- May 1998
- DOI:
- arXiv:
- arXiv:cond-mat/9711246
- Bibcode:
- 1998PhRvB..5711775K
- Keywords:
-
- 74.60.Ge;
- 74.25.Jb;
- 74.25.Fy;
- 74.72.-h;
- Electronic structure;
- Transport properties;
- Cuprate superconductors;
- Condensed Matter - Superconductivity
- E-Print:
- RevTex file, 10 pages