淡江大學機構典藏:Item 987654321/117390
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    题名: Compression mechanisms in the anisotropically bonded elements Se and Te
    作者: H. C. Hsueh;C. C. Lee;C. W. Wang;J. Crain
    贡献者: 淡江大學物理學系
    日期: 2000-02
    上传时间: 2019-10-15 12:11:14 (UTC+8)
    出版者: American Physical Society
    摘要: The compression mechanisms of the elements selenium and tellurium (which exhibit highly anisotropic bonding under ambient conditions) are explored. A combination of experiments and ab initio simulation (including generalized gradient corrections) is used to examine the structural and dynamic properties of these elements in detail. The effect of pressure on both these systems is to enhance the weak interchain bonding at the expense of the stronger intrachain covalent interactions. This is manifested by a pronounced mode softening of the intrachain vibrational modes under pressure as found from both Raman spectroscopy and simulation. A corresponding increase of the rigid-chain rotation mode is also revealed by the calculations. We also investigate pressure-induced polymorphism in these materials in order to resolve controversy concerning the high-pressure crystallographic structures.
    關聯: Physical Review B 61(6), p.3851-3856
    DOI: 10.1103/PhysRevB.61.3851
    显示于类别:[物理學系暨研究所] 期刊論文

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