title: Depinning of the Bragg glass in a point disordered model superconductor.
abstract: We perform simulations of the three-dimensional frustrated anisotropic XY model with point disorder as a model of a type-II superconductor with quenched point pinning in a magnetic field and a weak applied current. Using resistively shunted junction dynamics, we find a critical current I_{c} that separates a creep region with immeasurably low voltage from a region with a voltage V proportional, variant(I-I_{c}) and also identify the mechanism behind this behavior. It also turns out that data at fixed disorder strength may be collapsed by plotting V versus TI, where T is the temperature, though the reason for this behavior as yet not is fully understood.
authors.affiliation: Department of Physics, Umeå University, 901 87 Umeå, Sweden.
authors.forename: Peter
authors.initials: P
authors.lastname: Olsson