Spin susceptibility of one-dimensional extended Hubbard model at quarter filling

Y. Tanaka*, M. Ogata

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The ground-state property of one-dimensional extended Hubbard model is investigated at quarter filling. By using spin-charge factorized wave function in the U → ∞ limit, the effective exchange coupling Jeff and spin susceptibility χ are calculated as a function of nearest-neighbor Coulomb interaction V. It is found that Jeff is suppressed by the effect of V through charge fluctuation. The results indicate these quantities have no singularities at the transition point because of the Berezinskii-Kosterlitz-Thouless-type transition of charge ordering. We also confirm the results by exact diagonalization method in the realistic parameter range. The relevance to the experiments on quasi one-dimensional organic conductor ( DI-DCNQI )2 Ag is discussed.

Original languageEnglish
Pages (from-to)317-318
Number of pages2
JournalPhysica B: Condensed Matter
Issue numberSPEC. ISS.
Publication statusPublished - 2006 May 1
Externally publishedYes


  • Charge order
  • Spin susceptibility

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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