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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| Published in | Chinese physics letters Vol. 27; no. 2; pp. 184 - 186 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
IOP Publishing
01.02.2010
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0256-307X 1741-3540 |
| DOI | 10.1088/0256-307X/27/2/025204 |
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| Abstract | 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. |
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| AbstractList | Lattice waves including a longitudinal wave and a transverse wave in two-dimensional hexagonal quantum plasma crystals are investigated by using the modified Debye-Huckel 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. 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. |
| Author | 孙晓霞 王春华 高峰 |
| AuthorAffiliation | School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei 230009 |
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| CitedBy_id | crossref_primary_10_1103_RevModPhys_83_885 |
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| SubjectTerms | 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 |
| Title | Lattice Waves in Two-Dimensional Hexagonal Quantum Plasma Crystals |
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