Charge order, spin order and superconductivity in two-dimensional electron systems: Effect of nearest-neighbor Coulomb interaction

Hiroshi Watanabe, M. Ogata

Research output: Contribution to journalArticle


Motivated by the charge order (CO) and superconductivity (SC) in θ - ( ET )2 X salts, we study the extended Hubbard model in a two-dimensional triangular lattice with variational Monte Carlo method. We show that the nearest-neighbor Coulomb interaction V induces charge fluctuation and the 3-fold CO state is stabilized. We also discuss the possibility of next-nearest-neighbor f-wave SC induced by charge fluctuation.

Original languageEnglish
Pages (from-to)569-570
Number of pages2
JournalPhysica B: Condensed Matter
Issue numberSPEC. ISS.
Publication statusPublished - 2006 May 1
Externally publishedYes



  • θ - ( ET ) X salts
  • 3-fold charge order
  • Charge fluctuation
  • Next-nearest-neighbor f-wave superconductivity

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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