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Anomalous flux-flow dynamics in layered type-II superconductors at low temperatures

M. V. Feigel'man·M. A. Skvortsov
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Abstract

Low-temperature dissipation due to vortex motion in strongly anisotropic type-II superconductors with a moderate disorder ($Δ^2/E_F \ll \hbar/τ\ll Δ$) 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 $σ_{xx}$ is a bit lower than the quasiclassical one and {\it grows} slowly with the increase of the electric field.

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M. V. Feigel'man, M. A. Skvortsov. 1996-09-19. Anomalous flux-flow dynamics in layered type-II superconductors at low temperatures. https://doi.org/10.1103/physrevlett.78.2640

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