Supersonic dislocations observed in a plasma crystal

被引：93

作者：

Nosenko, V. ^{[1
]}

Zhdanov, S. ^{[1
]}

Morfill, G. ^{[1
]}

机构：

[1] Max Planck Inst Extraterr Phys, D-85741 Garching, Germany

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.99.025002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：4

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