Perturbative Calculation of the Spin-Wave Dispersion in a Disordered Double-Exchange Model(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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We study the spin-wave dispersion of localized spins in a disordered double-exchange model using the perturbation theory with respect to the strength of the disorder potential. We calculate the dispersion up to the next-leading order, and extensively examine the case of one dimension. We show that in that case, disorder yields anomalous gap-like behavior at the Fermi wave number of the conduction electrons.
- 2004-10-15
著者
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Fukui Takahiro
Department of Cardiology
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Fukui Takahiro
Department Of Mathematical Sciences Ibaraki University
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Semba Taeko
Department Of Mathematical Sciences Ibaraki University
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Semba Takeo
Department of Mathematical Sciences, Ibaraki University
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