Pinning time statistics for vortex lines in disordered environments
Abstract
We study the pinning dynamics of magnetic flux (vortex) lines in a disordered type-II superconductor. Using numerical simulations of a directed elastic line model, we extract the pinning time distributions of vortex line segments. We compare different model implementations for the disorder in the surrounding medium: discrete, localized pinning potential wells that are either attractive and repulsive or purely attractive, and whose strengths are drawn from a Gaussian distribution; as well as continuous Gaussian random potential landscapes. We find that both schemes yield power law distributions in the pinned phase as predicted by extreme-event statistics, yet they differ significantly in their effective scaling exponents and their short-time behavior.
Cite
@article{arxiv.1405.7261,
title = {Pinning time statistics for vortex lines in disordered environments},
author = {Ulrich Dobramysl and Michel Pleimling and Uwe C. Tauber},
journal= {arXiv preprint arXiv:1405.7261},
year = {2014}
}
Comments
7 pages, 5 figures, to appear in Phys. Rev. E