Flux front penetration in disordered superconductors
Superconductivity
2009-11-07 v1
Abstract
We investigate flux front penetration in a disordered type II superconductor by molecular dynamics (MD) simulations of interacting vortices and find scaling laws for the front position and the density profile. The scaling can be understood performing a coarse graining of the system and writing a disordered non-linear diffusion equation. Integrating numerically the equation, we observe a crossover from flat to fractal front penetration as the system parameters are varied. The value of the fractal dimension indicates that the invasion process is described by gradient percolation.
Keywords
Cite
@article{arxiv.cond-mat/0102461,
title = {Flux front penetration in disordered superconductors},
author = {Stefano Zapperi and Andre A. Moreira and Jose S. Andrade},
journal= {arXiv preprint arXiv:cond-mat/0102461},
year = {2009}
}
Comments
5 pages, 4 figures, to appear in Phys. Rev. Lett