Plastic depinning of superconductor vortices

We present numerical simulation results for driven vortex lattices in presence of random disorder at zero temperature. The dynamics of vortices is studied for strong disorder. Plastic regimes at the depinning transition are analysed. The scenario of a second order phase transition ν ∼ (F — Fc)β for the velocity v emerges. The exponent β ∼ 1.2 is extracted from the critical region of several lattice sizes. Furthermore, the dynamical regimes at the depinning threshold are shown to be chaotic.