Charge order and superconductivity in two-dimensional triangular lattice at n = 2/3

Hiroshi Watanabe, Masao Ogata

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

To investigate the possibility of charge order and superconductivity in a doped two-dimensional triangular lattice, we study an extended Hubbard model with the variational Monte Carlo method. At n = 2/3, a commensurate filling for a triangular lattice, it is shown that the nearest-neighbor Coulomb interaction V induces honeycomb-type charge order and antiferromagnetic spin order at U ≳ 10t. We also discuss the possibility of superconductivity induced by charge fluctuation and the relation to the superconductivity in Na 0.35CoO2·1.3H2O and θ-type organic condoctors.

Original languageEnglish
Pages (from-to)2901-2904
Number of pages4
JournalJournal of the Physical Society of Japan
Volume74
Issue number11
DOIs
Publication statusPublished - 2005 Nov
Externally publishedYes

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superconductivity
Monte Carlo method
interactions

Keywords

  • θ-type organic conductor
  • Charge fluctuation
  • Charge order
  • NaCoO ·1.3HO
  • Superconductivity
  • Variational Monte Carlo method

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Charge order and superconductivity in two-dimensional triangular lattice at n = 2/3. / Watanabe, Hiroshi; Ogata, Masao.

In: Journal of the Physical Society of Japan, Vol. 74, No. 11, 11.2005, p. 2901-2904.

Research output: Contribution to journalArticle

Watanabe, Hiroshi ; Ogata, Masao. / Charge order and superconductivity in two-dimensional triangular lattice at n = 2/3. In: Journal of the Physical Society of Japan. 2005 ; Vol. 74, No. 11. pp. 2901-2904.
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