title: Dynamic phases, pinning, and pattern formation for driven dislocation assemblies.
abstract: We examine driven dislocation assemblies and show that they can 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 pinned-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 plastic depinning transitions can be applied to dislocation systems, providing a new approach for understanding pattern formation and dynamics in these systems.
authors.affiliation: 1] Dept. of Materials Science and Engineering, Missouri University of Science and Technology, Rolla, MO 65409, USA [2] Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: Caizhi
authors.initials: C
authors.lastname: Zhou
authors.affiliation: Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: Charles
authors.initials: C
authors.lastname: Reichhardt
authors.affiliation: Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: Cynthia J
authors.initials: CJ
authors.lastname: Olson Reichhardt
authors.affiliation: Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: Irene J
authors.initials: IJ
authors.lastname: Beyerlein