An Extension of the Coherent-Potential Approximation. II : Single-Particle Excitation Functions
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概要
- 論文の詳細を見る
On the basis of an extension of the coherent-potential approximation, the single-particle excitation function of a quasi-particle in a substitutionally disordered system is formulated for the Hamiltonian with off-diagonal disorder in addition to diagonal one. A particular attention is paid to the effect of site-dependence of the strength of coupling between a quasi-particle and an external quantum. The formalism is applicable to the case where the inverse of the propagator of the quasi-particle is a quasi-additive random operator. The theory is compared with other existing theories which have their own ranges of applicability.
- 理論物理学刊行会の論文
- 1975-12-25
著者
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Niizeki K
Tohoku Univ. Sendai
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Niizeki Komajiro
Department Of Physics Tohoku University
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Niizeki Komajiro
Department Of Physics Faculty Of Science Tohoku University
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