VIBRATIONAL PROPERTIES OF AN OCTAGONAL QUASI-CRYSTAL
文献类型：期刊论文
| 作者 | Z. Y. Liu ; Z. H. Zhang ; J. Qing ; D. C. Tian |
| 刊名 | Journal of Physics-Condensed Matter
 |
| 出版日期 | 1992 |
| 卷号 | 4期号:29页码:6343-6354 |
| 关键词 | local atomic environment tight-binding bands penrose lattice states diffusion spectrum |
| ISSN号 | 0953-8984 |
| 中文摘要 | The vibrational densities of states for an octagonal quasiperiodic lattice are calculated. Crossovers from phonon excitations to fracton-like excitations are found in the low-frequency parts of the spectra (this part is referred to as the continuous spectrum); meanwhile, localized vibrational modes are observed in the high-frequency parts (this part is referred to as the characteristic spectrum). The spectral features are governed by alpha and beta, the central and non-central force constants of the Born model. For the low-frequency continuous spectrum, when alpha/beta equals unity (isotropic model) and when alpha/beta is not very large, a power law is satisfied in the fracton-like excitation frequency regime but, when alpha/beta approaches infinity, the spectrum deviates from the original power law. For the high-frequency characteristic spectrum, in an isotropic situation, i.e. in the case when alpha/beta = 1, the localized mode is isolated and a gap separates it from other modes but, when there is no longer isotropy, the gap disappears. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/39264]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Z. Y. Liu,Z. H. Zhang,J. Qing,et al. VIBRATIONAL PROPERTIES OF AN OCTAGONAL QUASI-CRYSTAL[J]. Journal of Physics-Condensed Matter,1992,4(29):6343-6354. |
| APA | Z. Y. Liu,Z. H. Zhang,J. Qing,&D. C. Tian.(1992).VIBRATIONAL PROPERTIES OF AN OCTAGONAL QUASI-CRYSTAL.Journal of Physics-Condensed Matter,4(29),6343-6354. |
| MLA | Z. Y. Liu,et al."VIBRATIONAL PROPERTIES OF AN OCTAGONAL QUASI-CRYSTAL".Journal of Physics-Condensed Matter 4.29(1992):6343-6354. |
入库方式： OAI收割
来源：金属研究所
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