Stability of dust lattice modes in the presence of charged dust grain polarization in plasmas

被引：12

作者：

Kourakis, I ^{[1
]}

Shukla, PK ^{[1
]}

机构：

[1] Ruhr Univ Bochum, Inst Theoret Phys 4, Fac Phys & Astron, D-44780 Bochum, Germany

来源：

PHYSICS LETTERS A | 2006年 / 351卷 / 1-2期

关键词：

dust lattice oscillations; dusty plasma crystals; electrostatic interactions;

D O I：

10.1016/j.physleta.2005.10.062

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We discuss the effect of the attractive force associated with overlapping Debye spheres on the dispersion properties of the longitudinal and transverse dust lattice waves in strongly coupled dust crystals. The dust grain attraction is shown to contribute to a destabilization of the longitudinal dust lattice oscillations. The (optic-like) transverse mode dispersion law is shown to change. due to the Debye sphere dressing effect, from the known inverse-dispersive ("backward wave") form into a normal dispersive law (i.e. the group velocity changes sign). The stability of one-dimensionless bi-layers, consisting of (alternating) negatively and positively charged dust particles, is also discussed. The range of parameter values (mainly in terms of the lattice parameter kappa) where the above predictions are valid, are presented. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：101 / 104

页数：4

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