Ordered dust structures in a glow discharge

被引：8
|
作者：
Karasev, V. Yu. [1 ]
Ivanov, A. Yu. [1 ]
Dzlieva, E. S. [1 ]
Eikhvald, A. I. [1 ]
机构：
[1] St Petersburg State Univ, Inst Phys, St Petersburg 198504, Russia
来源：
JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS | 2008年 / 106卷 / 02期
关键词：
D O I：
10.1134/S1063776108020180
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Highly ordered three-dimensional dust structures are created in a striated glow discharge, and their horizontal cross-sectional images are analyzed. Calculated correlation functions, local correlation parameters, and corresponding approximations are used to classify the state of a structure according to the Kosterlitz-Thouless-Halperin-Nelson-Young (KTHNY) two-dimensional melting theory and a phenomenological approach. An orientational map based on an orientational parameter is proposed to expose domains in a cross section of a structure. It is shown that a plasma crystal is a polycrystal consisting of hexagonal domains (crystallites). Thermophoretic forces are used to create corners of various angles in the perimeter of the structure. Transition between hexagonal and square cell shapes is observed.
引用
收藏
页码：399 / 403
页数：5
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