2004年8月
Superconductivity due to charge fluctuation in theta-type organic conductors
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
- ,
- ,
- 巻
- 73
- 号
- 8
- 開始ページ
- 2053
- 終了ページ
- 2056
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1143/JPSJ.73.2053
- 出版者・発行元
- PHYSICAL SOC JAPAN
Superconductivity close to charge ordering in quasi-two-dimensional 3/4-filled organic compounds is investigated for the theta-type structure. The effect of spin and charge fluctuations is calculated within random phase approximation for a relevant extended Hubbard model with both on-site (U) and intersite (V) Coulomb interactions on an anisotropic triangular lattice. It is found that both spin and charge fluctuations induce superconductivity with extended s-wave singlet pairing, which-is similar to the d(xy) pairing state in the square lattice. In the vicinity of charge-density-wave instability, f-wave triplet pairing is also stable due to the effect of nearest-neighbor Coulomb interaction. The temperature dependences of superconductivity and charge-density-wave phase boundaries are also examined.
- リンク情報
- ID情報
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- DOI : 10.1143/JPSJ.73.2053
- ISSN : 0031-9015
- Web of Science ID : WOS:000223630900006