Transition Temperatures in Cuprate Superconductors on the Basis of d-p Model
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概要
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On the basis of d-p model, both normal and anomalous self-energies are calculated perturbatively up to third order with respect to the Coulomb repulsion U between d-electrons at a Cu site. The superconducting transition temperature T_c is obtained as a function of d- and p-hole numbers by the solution of the Dyson-Gor'kov equation. In the over-doped region, T_c decreases with the increase of the total hole number δ. This experimentally obtained behavior of T_c is successfully reproduced. In the under-doped region, T_c decreases rapidly with the decrease of δ experimentally. Such a rapid change of T_c is not obtained in our calculation, but it is found that T_c is almost independent of δ by the suppression due to the vertex corrections.
- 社団法人日本物理学会の論文
- 1994-11-15
著者
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Hotta Takashi
Department Of Neurological Surgery Sapporo Medical College And Hospital
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Hotta Takashi
Department Of Physics Faculty Of Science Kyoto University:institute For Solid State Physics Universi
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