Vortex dynamics in disordered type-II superconductors

Details Vortex dynamics in disordered type-II superconductors Vortex dynamics in disordered type-II superconductors

1995-05-23

arxiv.org/abs/cond-mat/9505103v1

Physics

Condensed Matter

13 pages (REVTeX), uuencoded compressed tar file with 1 postscript figure

Scientific paper

10.1103/PhysRevLett.75.136

A field theoretical method is developed which permits us to study the dynamics of vortices in disordered environments. In particular, we obtain a self-consistent system of equations for disorder averaged quantities. Making use of a Hartree-type approximation, we calculate the current-voltage (I-V) characteristics in the flux flow regime. In order to probe incipient melting of the vortex lattice we propose an experiment where interference steps in the I-V characteristics are observed, which arise when a small ac field is superimposed on the constant voltage.

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