Theory of a D^- Band

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概要

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• The many-electron theory of a D^- band is developed for both cases of a single- and many-valleys in the effective mass approximation with an isotropic effective mass in semiconductors. The effective Hamiltonian for a D^- band of (N+1) electrons for an N-donor system is derived in the electronic configuration space composed of (N-1) neutral donors and a D^- ion, where the effect of extension of the orbital in a D^- ion is taken into account. The density of states of a D^- band is calculated by taking into account explicitly a spin configuration of up or down spin state at each neutral donor and by extending Matsubara-Toyozawa approximation. It is shown that the calculated density of states of a D^- band is narrower than that in the absence of the spin correlation effect in a D^- ion. In connection with this, the spin polarization effect of the D^- band is investigated. The extension of the theory to a many-valley case relaxes the spin correlation effect partly and hence causes the increase of the band width of a D^- band.

• 理論物理学刊行会の論文
• 1981-06-10

著者

• 上村 洸

  Department Of Applied Physics Science University Of Tokyo

• Kamimura Hiroshi

  Department Of Electronic Engineering Gunma University

• Natori Akiko

  Department Of Electronic Engineering The University Of Electro-communications

• Natori Akiko

  Department Of Physics University Of Tokyo

• Kamimura Hiroshi

  Department Of Applied Physics . Faculty Of Science Tokyo University Of Science

• NATORI Akiko

  Department of Physics, University of Tokyo

• Kamimura Hiroshi

  Department of Physics Faculty of Science,University of Tokyo

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