Novel charge order and superconductivity in two-dimensional frustrated lattice at quarter filling

Hiroshi Watanabe*, Masao Ogata

*この研究の対応する著者

研究成果: Article査読

65 被引用数 (Scopus)

抄録

Motivated by the various physical properties observed in θ-(BEDT-TTF)2X, we study the ground state of an extended Hubbard model on two-dimensional anisotropic triangular lattice at 1/4-filling with the variational Monte Carlo method. It is shown that the nearest-neighbor Coulomb interaction enhances charge fluctuation and it induces anomalous states such as the charge-ordered metallic state and triplet next-nearest-neighbor f-wave superconductivity. We consider that these results can explain the coexistence of different charge orders observed in the case of X = CsCo(SCN)4 and superconductivity in the case of X = I3. We then propose a unified view of the family of organic conductors θ-(BEDT-TTF)2X with the value of tc/tp.

本文言語English
論文番号063702
ジャーナルJournal of the Physical Society of Japan
75
6
DOI
出版ステータスPublished - 2006 6月
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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