Transition from attractive to repulsive forces between dust molecules in a plasma sheath

被引：250

作者：

Melzer, A

Schweigert, VA

Piel, A

机构：

[1] Univ Kiel, Inst Expt & Angew Phys, D-24098 Kiel, Germany

[2] Russian Acad Sci, Inst Theoret & Appl Mech, Novosibirsk 630090, Russia

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.83.3194

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The electrostatic interaction of a system of two single dust particles in a plasma-sheath environment with flowing ions has been investigated quantitatively. It is shown that attractive net "binding" forces between the negatively charged particles exist, leading to the formation of a dust molecule. By laser manipulation of the dust particles, it is demonstrated that the attraction is asymmetric in such a way that it acts only on one of the particles. Moreover, the net forces between the particles can be reversibly changed between attraction and repulsion.

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页码：3194 / 3197

页数：4

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