Transition to plastic motion as a critical phenomenon and anomalous interface layer of a 2D driven vortex lattice
Laboratoire de Physique des Solides, CNRS
Université Paris-Sud, 91405 Orsay Cedex, France
Corresponding author: a firstname.lastname@example.org
Published online: 15 February 2002
The dynamic transition between ordered flow and plastic flow is studied for a two-dimensional driven vortex lattice, in the presence of sharp and dense pinning centers, from numerical simulations. For this system, which does not show smectic ordering, the lattice exhibits a first order transition from a crystal to a liquid, shortly followed by the dynamical transition to plastic flow. The resistivity provides a critical order parameter for the latter, and critical exponents are determined in analogy with a percolation transition. At the boundary between a pinned region and an unpinned one, an anomalous layer is observed, where the vortices are more strongly pinned than in the bulk.
PACS: 64.60.Ht – Dynamic critical phenomena / 74.60.Ge – Flux pinning, flux creep and flux-line lattice dynamics
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002