%0 Journal Article
%T Flux front penetration in disordered superconductors
%A Stefano Zapperi
%A Andre A. Moreira
%A Jose S. Andrade Jr
%J Physics
%D 2001
%I arXiv
%R 10.1103/PhysRevLett.86.3622
%X 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.
%U http://arxiv.org/abs/cond-mat/0102461v1