Superconductivity due to charge fluctuation in θ-type organic conductors

Yasuhiro Tanaka, Youichi Yanase, Masao Ogata

研究成果: Article

35 引用 (Scopus)

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Superconductivity close to charge ordering in quasi-two-dimensional 3/4-filled organic compounds is investigated for the θ-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 dxy 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.

元の言語English
ページ(範囲)2053-2056
ページ数4
ジャーナルJournal of the Physical Society of Japan
73
発行部数8
DOI
出版物ステータスPublished - 2004 8 1
外部発表Yes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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