Dynamic phase diagram in a driven vortex lattice with random pinning and thermal fluctuations

Abstract

Using Monte Carlo molecular dynamic simulations, we calculate the mean vortex velocity, differential resistance, longitudinal voltage noise, and static structure factor for driven vortex lattices with random pinning and thermal fluctuations, from which a dynamic phase diagram in the driving force F L and vortex density N v plane is obtained. It is found that, with increasing F L , the dynamic phases are generally in order given by the pinning glass, plastic flow, smectic flow, moving transverse glass, and moving Bragg glass. At low vortex densities the moving transverse glass phase may be absent, while the smectic flow phase is absent at high vortex densities.