Superconductivity

Electric field induced by vortex transport in percolation superconductors

Ya. I. Kuzmin<sup>ab

a</sup> Ioffe Institute, St. Petersburg
^b Peter the Great St. Petersburg Polytechnic University

Abstract: The influence of fractal normal phase clusters on the electric field induced by the flow and creep of the magnetic flux in percolation superconductors has been considered. The current–voltage characteristics of such superconductors with allowance for the influence of the fractal dimension of cluster boundaries and the pinning barrier height have been obtained. The vortex dynamics in percolation superconductors with a fractal cluster structure in a viscous flow of the magnetic flux, the Anderson–Kim creep, and the collective flux creep has been analyzed. It has been discovered that the fractality of normal phase clusters reduces the electric field arising in the initial stage of the resistive transition.

Received: 11.04.2016

 English version: Physics of the Solid State, 2016, 58:10, 1945–1951

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