Dynamic transition in driven vortices across the peak effect in superconductors -: art. no. 052507

We study the zero-temperature dynamic transition from the disordered flow to an ordered flow state in driven vortices in type-II superconductors. The transition current I-p is marked by a sharp kink in the V(I) characteristic with a concomitant large increase in the defect concentration. On increasing magnetic field B, the I-p(B) follows the behavior of the critical current I-c(B). Specifically, in the peak effect regime I-p(B) increases rapidly along with I-c. We also discuss the effect of varying disorder strength on I-p.