Charge-Fluctuation-Mediated Superconductivity in the d-p Model : Critical Study of the Retardation Effects
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概要
- 論文の詳細を見る
Charge-fluctuation-mediated superconductivity in the simplest d-p model is investigated using the auxiliary boson method together with the 1/N-expansion theory. The transition temperature T_c is determined by solving the Eliashberg equation derived for the pairing interaction including the full momentum and frequency dependence. The pairing state with the highest T_c has an extended s-symmetry described mainly by the on-site and the nearest-neighbor pairings. While the pairing interaction is repulsive over almost the entire momentum space, the frequency dependence, i.e., the retardation effect, is essential to realize such a superconducting state. The order of magnitude of T_c is estimated to be ≲230 K with a reasonable set of the parameters, which means that the charge fluctuation plays a crucial role in the system.
- 社団法人日本物理学会の論文
- 1995-07-15
著者
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Kuroda Yoshihiro
Department of Pharmaceutical Health Care, Faculty of Pharmaceutical Sciences, Himeji Dokkyo Universi
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KOBAYASHI Akito
Department of Physics,Nagoya University
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MATSUURA Tamifusa
Department of Physics,Nagoya University
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Tamifusa Matsuura
Department Of Physics Nagoya University
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Matsuura Tamifusa
Department Of Physics Nagoya University
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Azami Munehiro
Department of Physics,Nagoya University
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Kobayashi A
Institute For Advanced Research Nagoya University
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Kobayashi Akito
Department Of Physics Nagoya University
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Azami Munehiro
Department Of Physics Nagoya University
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Kosuge Yu
Department Of Physics Nagoya University
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Kuroda Yoshihiro
Department Of Pharmaceutical Health Care Faculty Of Pharmaceutical Sciences Himeji Dokkyo University
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Kobayashi Akito
Department Of Physics Division Of Material Science Nagoya University
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