Mismatch of conductivity anisotropy in the mixed and normal states of type-II superconductors - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2012

Mismatch of conductivity anisotropy in the mixed and normal states of type-II superconductors

Résumé

We have calculated the Bardeen-Stephen contribution to the vortex viscosity for uniaxial anisotropic superconductors within the time-dependent Ginzburg-Landau (TDGL) theory. We focus our attention on superconductors with a mismatch of anisotropy of normal and superconducting characteristics. Exact asymptotics for the Bardeen-Stephen contribution have been derived in two limits: the cases of small and large electric field penetration depth (as compared to the coherence length). Also we suggest a variational procedure which allows us to calculate the vortex viscosity for superconductors with arbitrary ratio of the coherence lenght to the electric field penetration depth. The approximate analytical result is compared with numerical calculations. Finally, using a generalized TDGL theory, we prove that the viscosity anisotropy and, thus, the flux-flow conductivity anisotropy may depend on temperature.
Fichier principal
Vignette du fichier
BespalovPRB2012.pdf (383.46 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-00731814 , version 1 (13-03-2018)

Identifiants

Citer

A. A. Bespalov, A. S. Mel'Nikov. Mismatch of conductivity anisotropy in the mixed and normal states of type-II superconductors. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2012, 85 (17), pp.1745002 (1-10). ⟨10.1103/PhysRevB.85.174502⟩. ⟨hal-00731814⟩

Collections

CNRS LOMA
85 Consultations
55 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More