Gliding dislocations in a driven vortex lattice

TL;DR

This paper investigates how dislocations move within a driven vortex lattice, revealing a specific decay law for dislocation glide velocity at high drives and estimating the transition point between elastic and plastic vortex motion regimes.

Contribution

It introduces a detailed analysis of dislocation dynamics under external drive, including a novel decay law for glide velocity and an estimation of the crossover velocity between motion regimes.

Findings

Dislocation glide velocity decays as V_d ~ v^{-4} at high drive.

Identifies the crossover velocity between elastic and plastic vortex motion.

Provides insights into vortex lattice dynamics under external forces.

Abstract

The dynamics of dislocations in a two-dimensional vortex lattice is studied in the presence of a pinning potential and a transport current. In a vortex lattice drifting with velocity $v$ a glide velocity $V_d$ of the dislocation with respect to the vortex lattice is found to decay like $V_d \sim v^{-4}$ for large drive. From this result the velocity for the crossover between a regime of coherent elastic motion and a regime of incoherent plastic motion of vortices is estimated.