Electronic States in Magnetic Semiconductors : An Extension of CPA to Random Spin Systems
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概要
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Electronic structure in magnetic semiconductors is investigated on the basis of the s-d exchange model. The exchange scattering of an electron by localized spins is treated in the coherent potential approximation. Coupled equations for the down- and up- spin Green functions are obtained, These equations agree in the weak s-d interaction limit with the results of the molecular field approximation and in the strong interaction limit with those obtained previously by the present author. The density of states for down- and up- spin is calculated in the paramagnetic and completely ferromagnetic states for various values of interaction strength, by assuming a semi-elliptic form for unperturbed density of states.
- 社団法人日本物理学会の論文
- 1974-01-15
著者
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KUBO Kenn
Department of Physics, Aoyama Gakuin University
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Kubo Kenn
Department Of Physics Tokyo University Of Education
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KUBO Kenn
Department of Physics and Astronomy,Michigan State University
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