Antiferromagnetic and Superconducting Correlations on the d-p Model : Condensed Matter: Electronic Properties, etc.
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概要
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We study superconducting fluctuation effects on the quasi-two-dimensional d-p model, which can describe significant features of high-T_c superconducting cuprates. We adopt the fluctuation exchange approximation in order to derive both normal and anomalous vertices of renormalized d-electron propagators, and then solve the Bethe-Salpeter equation for the anomalous vertex and derive t-matrix as a superconducting fluctuation propagator. We calculate the normal d-electron self-energy self-consistently, and get a self-consistent solution for the circumstance in which the system is close to both antiferromagnetic and superconducting instabilities. The solution exhibits the suppression of the density of states near (±π, 0) and (0, ±π), which reflects the experimental result on the normal state of underdoped cuprates.
- 社団法人日本物理学会の論文
- 2000-03-15
著者
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Koikegami Shigeru
Department Of Physics Kyoto University
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Yamada Kosaku
Department Of Mechanical Engineering Faculty Of Engineering Kagoshima University
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Koikegami Shigeru
Department of Physics, Kyoto University
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