Fluctuation depinning of the dislocation kink under the influence of external forces

TL;DR

This paper analyzes how external ac and dc forces influence the probability of dislocation kink depinning within a linearized perturbation framework, providing detailed insights into the depinning process.

Contribution

It introduces a linearized model of dislocation kink depinning under combined ac and dc forces using McLaughlin-Scott theory, offering new analytical insights.

Findings

Depinning probability depends on both ac and dc force magnitudes.

The model predicts how external forces modulate depinning likelihood.

Detailed dependency analysis enhances understanding of dislocation dynamics.

Abstract

Within the framework of McLaughlin-Scott perturbation theory the equation-of-motion of the dislocation kink in the pinning potential is linearized, assuming the simultaneous influence of ac and dc forces. Based on the equations derived, the probability of kink depinning was studied. The dependencies of the depinning probability on dc and ac forces are analyzed in details.