Lattice Waves in Two-Dimensional Hexagonal Quantum Plasma Crystals

Lattice waves including a longitudinal wave and a transverse wave in two-dimensional hexagonal quantum plasma crystals are investigated by using the modified Debye-Hückel screening potential. It is shown that there exists an unstable region of lattice parameters, where the system will melt. The gene...

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Bibliographic Details
Published inChinese physics letters Vol. 27; no. 2; pp. 184 - 186
Main Author 孙晓霞 王春华 高峰
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.02.2010
Subjects
Dispersions
Lattices
Longitudinal waves
Melts
Plasma crystals
Translations
Transverse waves
Two dimensional
二维
休克尔
六角形
晶格参数
离子晶体
等离子体
色散关系
量子波
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ISSN0256-307X
1741-3540
DOI10.1088/0256-307X/27/2/025204

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Summary:Lattice waves including a longitudinal wave and a transverse wave in two-dimensional hexagonal quantum plasma crystals are investigated by using the modified Debye-Hückel screening potential. It is shown that there exists an unstable region of lattice parameters, where the system will melt. The general dispersion relations are derived, and the waves propagating parallel to a primitive translation vector are discussed. We find that both the longitudinal and transverse waves are acoustic-like, and the longitudinal wave has a greater sound speed than that of the transverse wave in the long wavelength limit region.
Bibliography:11-1959/O4
TN304.26
TN304.6
ObjectType-Article-2
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ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/27/2/025204