Dynamic Phases, Pinning, and Pattern Formation for Driven Dislocation Assemblies

TL;DR

This paper demonstrates that driven dislocation assemblies exhibit various dynamical phases similar to systems with quenched disorder, revealing new insights into dislocation pattern formation and dynamics.

Contribution

It introduces the idea that dislocation systems share dynamical phases with quenched disorder systems, offering a novel perspective for understanding their behavior.

Findings

Dislocation assemblies show jammed, fluctuating, and ordered phases.

Distinct dislocation patterns correlate with specific noise and transport features.

Results suggest applicability of quenched disorder depinning theories to dislocation dynamics.

Abstract

We show that driven dislocation assemblies exhibit a set of dynamical phases remarkably similar to those of driven systems with quenched disorder such as vortices in superconductors, magnetic domain walls, and charge density wave materials. These phases include jammed, fluctuating, and dynamically ordered states, and each produces distinct dislocation patterns as well as specific features in the noise fluctuations and transport properties. Our work suggests that many of the results established for systems with quenched disorder undergoing depinning transitions can be applied to dislocation systems, providing a new approach for understanding dislocation pattern formation and dynamics.