Supersonic dislocations observed in a plasma crystal
Soft Condensed Matter
2009-11-13 v1 Materials Science
Abstract
Experimental results on the dislocation dynamics in a two-dimensional plasma crystal are presented. Edge dislocations were created in pairs in lattice locations where the internal shear stress exceeded a threshold and then moved apart in the glide plane at a speed higher than the sound speed of shear waves, . The experimental system, a plasma crystal, allowed observation of this process at an atomistic (kinetic) level. The early stage of this process is identified as a stacking fault. At a later stage, supersonically moving dislocations generated shear-wave Mach cones.
Keywords
Cite
@article{arxiv.0709.1782,
title = {Supersonic dislocations observed in a plasma crystal},
author = {V. Nosenko and S. Zhdanov and G. Morfill},
journal= {arXiv preprint arXiv:0709.1782},
year = {2009}
}