Nonequilibrium dislocation dynamics and instability of driven vortex lattices in two dimensions

Igor S. Aranson, Stefan Scheidl

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

We consider dislocations in a vortex lattice that is driven in a two-dimensional superconductor with random impurities. The structure and dynamics of dislocations are studied in this genuine nonequilibrium situation on the basis of a coarse-grained equation of motion for the displacement field. The presence of dislocations leads to a characteristic anisotropic distortion of the vortex density that is controlled by a Kardar-Parisi-Zhang nonlinearity in the coarse-grained equation of motion. This nonlinearity also implies a screening of the interaction between dislocations and thereby an instability of the vortex lattice to the proliferation of free dislocations.

Original languageEnglish (US)
Pages (from-to)14541-14547
Number of pages7
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume58
Issue number21
DOIs
StatePublished - 1998

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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