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Anomalous flux-flow dynamics in layered type-II superconductors at low temperatures | | M. V. Feigel’man
; M. A. Skvortsov
; | | Date: |
18 Sep 1996 | | Journal: | Phys. Rev. Lett. 78, 2640 (1997) | | Subject: | cond-mat | | Affiliation: | Landau Institute for Theoretical Physics, Moscow, Russia | | Abstract: | Low-temperature dissipation due to vortex motion in strongly anisotropic type-II superconductors with a moderate disorder ($Delta^2/E_F ll hbar/ au ll Delta$) is shown to be determined by the Zener-type transitions between the localized electronic states in the vortex core. Statistics of these levels is described by the random matrix ensemble of the class C defined recently by Atland and Zirnbauer [cond-mat/9602137], so the vortex motion leads naturally to the new example of a parametric statistics of energy levels. The flux-flow conductivity $sigma_{xx}$ is a bit lower than the quasiclassical one and {it grows} slowly with the increase of the electric field. | | Source: | arXiv, cond-mat/9609173 | | Services: | Forum | Review | PDF | Favorites | |
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