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Supersonic Dislocations Observed in a Plasma Crystal

Supersonic Dislocations Observed in a Plasma Crystal 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, C T . 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review Letters American Physical Society (APS)

Supersonic Dislocations Observed in a Plasma Crystal

Physical Review Letters , Volume 99 (2) – Jul 13, 2007
4 pages

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Publisher
American Physical Society (APS)
Copyright
Copyright © 2007 The American Physical Society
ISSN
1079-7114
DOI
10.1103/PhysRevLett.99.025002
pmid
17678228
Publisher site
See Article on Publisher Site

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, C T . 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.

Journal

Physical Review LettersAmerican Physical Society (APS)

Published: Jul 13, 2007

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