Dynamic transition in driven vortices across the peak effect in superconductors

Abstract

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 ${I}_{p}.$