Superconducting Pairing Symmetry on the Extended Hubbard Model in the Presence of the Rashba-Type Spin--Orbit Coupling
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概要
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In order to study the pairing symmetry in non-centrosymmetric superconductors, we solve the linearized Éliashberg's equation on the two-dimensional extended Hubbard model in the presence of the Rashba-type spin--orbit coupling (RSOC) within the random phase approximation. In the presence of the RSOC, three types of pairing symmetries appear in the phase diagram with respect to the on-site Coulomb repulsion U and off-site one V. Each of the pairing symmetries is an admixture of the spin-singlet and spin-triplet ones. On the basis of our analytical study, it is found that the admixture of the spin-singlet and spin-triplet components depends on not only the predominant pairing symmetry but also the dispersion relation and pairing interaction.
- 2013-01-15
著者
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Tanaka Yukio
Department Of Applied Physics Nagoya University
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Onari Seiichiro
Department Of Applied Physics Nagoya University
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Shigeta Keisuke
Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan
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