Theory of Plastic Vortex Creep

J. Kierfeld, H. Nordborg, and V. M. Vinokur
Phys. Rev. Lett. 85, 4948 – Published 4 December 2000
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Abstract

We develop a theory for plastic vortex creep in a topologically disordered (dislocated) vortex solid phase in type-II superconductors in terms of driven thermally activated dislocation dynamics. Plastic barriers for dislocations show a power-law divergence at small driving currents j, Upl(j)jμ, with μ=1 for a single dislocation and μ=2/5 for creep of dislocation bundles. This implies a suppression of the creep rate at the transition from the ordered vortex phase ( μ=2/11) to the dislocated glass and can manifest itself as an observed increase of the apparent critical current (second peak). Our approach applies to general dynamics of disordered elastic media on a random substrate.

  • Received 5 July 2000

DOI:https://doi.org/10.1103/PhysRevLett.85.4948

©2000 American Physical Society

Authors & Affiliations

J. Kierfeld, H. Nordborg, and V. M. Vinokur

  • Argonne National Laboratory, Materials Science Division, 9700 South Cass Avenue, Argonne, Illinois 60439

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Issue

Vol. 85, Iss. 23 — 4 December 2000

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