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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2009, Volume 90, Issue 6, Pages 489–493
(Mi jetpl545)
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This article is cited in 39 scientific papers (total in 39 papers)
PLASMA, GASES
Structural properties of complex (dusty) plasma upon crystallization and melting
B. A. Klumovab, G. E. Morfillb a Scientific Association for High Temperatures
b Max-Planck-Institut für Extraterrestrische Physik, Garching, Germany
Abstract:
A change in the local order of a bounded complex (dusty) plasma in the process of its crystallization and melting has been examined by molecular dynamics simulations. The dynamics of microparticles is considered in the framework of a Langevin thermostat, the pair interaction between charged particles is described by a screened Coulomb potential (Yukawa potential) with the hard wall potential as a confinement. It has been shown that the beginning of the crystallization of such a system is accompanied by the formation of clusters with the hexagonal close packed (hcp) structure; a noticeable number of these clusters are then transformed to the face centered cubic (fcc) phase. A plasma crystal formed after crystallization consists of the metastable hcp phase, fcc clusters, and a small number of clusters with a body centered cubic (bcc) crystal lattice. Beginning with a certain threshold value of the thermostat temperature, the number of fcc/bcc clusters decreases sharply with increasing temperature, which is an important signature of the beginning of the melting of the plasma crystal.
Received: 11.08.2009
Citation:
B. A. Klumov, G. E. Morfill, “Structural properties of complex (dusty) plasma upon crystallization and melting”, Pis'ma v Zh. Èksper. Teoret. Fiz., 90:6 (2009), 489–493; JETP Letters, 90:6 (2009), 444–448
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https://www.mathnet.ru/eng/jetpl545 https://www.mathnet.ru/eng/jetpl/v90/i6/p489
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Abstract page: | 450 | Full-text PDF : | 132 | References: | 38 |
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