A Mechanism of Spin-Triplet Superconductivity in Hubbard Model on Triangular Lattice: Application to UNi<sub>2</sub>Al<sub>3</sub>
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- Nisikawa Yunori
- Department of Physics, Kyoto University, Kyoto 606-8502
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- Yamada Kosaku
- Department of Physics, Kyoto University, Kyoto 606-8502
書誌事項
- タイトル別名
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- A Mechanism of Spin-Triplet Superconductivity in Hubbard Model on Triangular Lattice: Application to UNi2Al3.
- Mechanism of Spin Triplet Superconductivity in Hubbard Model on Triangular Lattice Application to UNi2Al3
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説明
We discuss the possibility of spin-triplet superconductivity in a two-dimensional Hubbard model on a triangular lattice within the third-order perturbation theory. When we vary the symmetry in the dispersion of the bare energy band from D2 to D6, spin-singlet superconductivity in the D2-symmetric system is suppressed and we obtain spin-triplet superconductivity in near the D6-symmetric system. In this case, it is found that the vertex terms, which are not included in the interaction mediated by the spin fluctuation, are essential for realizing the spin-triplet pairing. We point out the possibility that obtained results correspond to the difference between the superconductivity of UNi2Al3 and that of UPd2Al3.
収録刊行物
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 71 (11), 2629-2632, 2002
一般社団法人 日本物理学会
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詳細情報 詳細情報について
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- CRID
- 1390001204183433728
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- NII論文ID
- 210000103942
- 110001954114
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- NII書誌ID
- AA00704814
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- BIBCODE
- 2002JPSJ...71.2629N
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 6359253
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- 本文言語コード
- en
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- データソース種別
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- JaLC
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