Localization of Electrons in Certain Random Lattices

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概要

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• The localization of electrons in random lattice is investigated with the Green's function method following Anderson's probabilistic approach. The energy dependence of the critical value (W/2V)_c for localization is obtained for a system with a potential fluctuation of width W and a short range type effective transfer energy V. The calculated results suggest that localized states appear preferably in the edges of the energy spectrum, and, with the increase in the ratio W/V, the regions of lacalized states spread toward the central region and finally cover the whole spectrum. Further, in a one-electron scheme, the effect of electron correlations on the localization of electrons is studied as a source of dynamical potential fluctuation. It is shown that electron correlations are quite effective for the electron localization, especially when correlation energy U exceeds static fluctuation width W.

• 社団法人日本物理学会の論文
• 1970-08-05

著者

• Kikuchi Minoru

  Toshiba Corporation Research And Development Center

• Kikuchi Minoru

  Toshiba Central Research Laboratory

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