Study of Superconductivity in Borocarbides on the Basis of Perturbation Theory
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概要
- 論文の詳細を見る
The borocarbide YNi2B2C with quasi-2-dimensional structure encounters a superconducting transition at Tc= 15.4 K, the pairing symmetry of which is not clarified; most of experiments suggest an extended s-wave state, while some claim a d-wave. In this paper, we investigate a possibility of a d-wave state, solving the Éliashberg equation within the third order perturbation theory for a repulsive Hubbard model with the band structure reproducing the main Fermi surface. It is shown that if the electron correlation gives the dominant contribution to the superconducting pairing interaction, the dxy-symmetry is the most favorable state corresponding to the (π, 0) peak structure of the spin susceptibility.
- Physical Society of Japanの論文
- 2001-10-15
著者
-
Yamada Kosaku
Department Of Mechanical Engineering Faculty Of Engineering Kagoshima University
-
Nomura Takuji
Department Of Physics Kyoto University
-
Ikeda Hiroaki
Department Of Cancer Vaccine Mie University Graduate School Of Medicine
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Fukazawa Hirono
Department Of Physics Kyoto University
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Fukazawa Hirono
Department of Physics, Kyoto University, Kyoto 606-8502
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