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

Yasuhiro Tanaka, M. Ogata

Research output: Contribution to journalArticle

Abstract

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
Volume378-380
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2006 May 1
Externally publishedYes

Fingerprint

Hubbard model
Organic conductors
magnetic permeability
Exchange coupling
transition points
Wave functions
Coulomb interactions
Ground state
conductors
wave functions
ground state
Experiments
interactions

Keywords

  • Charge order
  • Spin susceptibility

ASJC Scopus subject areas

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

Cite this

Spin susceptibility of one-dimensional extended Hubbard model at quarter filling. / Tanaka, Yasuhiro; Ogata, M.

In: Physica B: Condensed Matter, Vol. 378-380, No. SPEC. ISS., 01.05.2006, p. 317-318.

Research output: Contribution to journalArticle

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