On the Superexchange Interaction in the Hubbard Model
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概要
- 論文の詳細を見る
The origin of the superexchange interaction is reexamined in order to clarify that it works even in metallic phases. The wellknown kinetic exchange process is nothing but the virtual exchange process of high-energy spin excitations between the lower and upper Hubbard bands. The mechanism for Cooper pairing between Gutzwiller's heavy electrons, whose band lies between the lower and upper Hubbard bands, by the superexchange interaction can be regarded as that by high-energy spin fluctuations. Be-cause it can also be regarded as a kind of an excitonic mechanism using high-energy spin excitations, it is plausible that the superexchange interaction causes high-temperature superconductivity of Gutzwiller's heavy-electron liquids.
- 社団法人日本物理学会の論文
- 1994-02-15
著者
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Matsumoto N
National Inst. Agro‐environmental Sci. Tsukuba Jpn
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Matsumoto Naoyuki
Department Of Orthodontics Osaka Dental University
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Matsumoto N
National Institute Of Agro-environmental Sciences
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Matsumoto N
Department Of Removable Prosthodontics School Of Dentistry Tokushima University
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Ohkawa J.
Department of Physics, Hokkaido University
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Ohkawa Fusayoshi
Department Of Physics Faculty Of Science University Of Tokyo
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Ohkawa J.
Department Of Physics Hokkaido University
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Matsumoto Naoyuki
Department Of Biological Safety National Institute For Agro-environmental Sciences
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Matsumoto Naoyuki
Department and Faculty of Engineering, Graduate School, Chiba Institute of Technology
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