Vector Charge Density Wave Model of Metallic and Trigonal Te : Condensed Matter and Statistical Physics
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概要
- 論文の詳細を見る
High pressure metallic (m-) Te and pressure dependence of trigonal (t-) Te are studied by the vector charge density wave (VCDW) model, namely by coupled CDWs on vector p orbitals. Metallic Te comprising dimerized zigzag chains as well as semiconducting t-Te with helical chains can be described by VCDWs with the wave numbers (0, π/2, π/2) and (2π/3, 2π/3, 2π/3), respectively, on a simple cubic lattice. The VCDW model is improved to include all the first order change of the transfer interaction so that the effect of shear deformation can be taken into account. The VCDW model with suitable parameters can describe the electronic and lattice structures of t-Te and most of their pressure dependences. It can qualitatively explain the characteristic features of m-Te such as the chain dimerization and anisotropic energy band. The difference in the free energies between m- and t-Te decreases by pressure explaining qualitatively the pressure induced semiconductor-metal transition.
- 理論物理学刊行会の論文
- 1992-02-25
著者
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Fukutome Hideo
Department Of Physics Faculty Of Science Kyoto University
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Shimoi Y
Nanotechnology Research Institute (nri) And Synthetic Nano-function Materials Project (synaf) Nation
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Shimoi Yukihiro
Department Of Physics Faculty Of Science Kyoto University
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Shimoi Yukihiro
Nanotechnology Research Institute (NRI) and Synthetic Nano-Function Materials Project (SYNAF), National Institute of Advanced Industrial Science and Technology (AIST)
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SHIMOI Yukihiro
Department of Physics, Kyoto University
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FUKUTOME Hideo
Department of Physics, Faculty of Science, Kyoto University
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FUKUTOME Hideo
Department of Physics, Kyoto Unversity
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FUKUTOME Hideo
Deoartment of Physics, Kyoto University
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