Charge Fluctuations and Superconductivity in an Extended Periodic Anderson Model: A Weak Coupling Theory(Condensed matter: electronic structure and electric, magnetic, and optical properties)
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概要
- 論文の詳細を見る
An extended periodic Anderson model, a model where repulsive interaction between an f-electron and a conduction electron is considered in addition to repulsive interaction between f-electrons, on a square lattice is studied with the fluctuation exchange approximation. It is found that charge susceptibilities at q=(π,π) are enhanced as the f-electron level ∈_f becomes shallow, implying the tendency towards a charge density wave instability. The effective attractive interaction leading to superconductivity is then calculated, and is shown to depend on ∈_f nonmonotonically.
- 社団法人日本物理学会の論文
- 2008-02-15
著者
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SAIGA Yasuhiro
Department of Mathematics and Statistics, University of Melbourne
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Saiga Yasuhiro
Department Of Physics Nagoya University
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HIRASHIMA Dai
Department of Physics, Nagoya University
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Hirashima Dai
Department Of Physics Nagoya University
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SUGIBAYASHI Takashi
Department of Physics, Nagoya University
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Sugibayashi Takashi
Department Of Physics Nagoya University
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Saiga Yasuhiro
Department of Physics, Nagoya University
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Hirashima Dai
Department of Material Science, International Christian University, Mitaka, Tokyo 181-8585, Japan
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