Anomalous peak effect and current-driven flux lines in irradiated Bi_2Sr_2CaCu_2O_(8+#delta#): a computer simulation study

摘要

We performed a Monte Carlo simulation of current-driven flux-lines in an irradiated Bi_2Sr_2CaCu_2O_(8+#delta#) model. At a low temperature glassy phase, the applied current causes a rapid reduction of the c-axis coherence with decreasing temperature. We obtained a sharp peak effect in the critical current as a function of magnetic field B, when B increases towards the matching field. The current-induced non-equilibrium vortex state could explain the unusual critical state experimentally observed in the glassy phase.