Exact diagonalization study on the extended Hubbard model in an anisotropic triangular lattice

Ken Kanada, Tsutomu Watanabe, Seiichiro Onari, Yukio Tanaka

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A half-filled-band extended Hubbard model on an anisotropic triangular lattice is studied, using an exact diagonalization method, with κ-(BEDT-TTF)2X in mind. In the isotropic case, the charge fluctuation of (2 π / 3, 2 π / 3) is enhanced by the introduction of off-site Coulomb interaction (V). In the case of V = 0, the antiferromagnetic (AF) fluctuation is sizable for small frustration. However, when V is introduced, the AF fluctuation is rapidly suppressed and becomes substantially small, irrespective of the strength of frustration. Thus, it is revealed that both spin and charge fluctuations are sensitive to the shifts of t / t and V / t.

Original languageEnglish
Pages (from-to)3334-3336
Number of pages3
JournalJournal of Physics and Chemistry of Solids
Volume69
Issue number12
DOIs
Publication statusPublished - Dec 2008
Externally publishedYes

Fingerprint

Hubbard model
Coulomb interactions
frustration
BEDT-TTF
shift
interactions

Keywords

  • A. Organic compounds
  • D. Charge-density waves
  • D. Spin-density waves

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)

Cite this

Exact diagonalization study on the extended Hubbard model in an anisotropic triangular lattice. / Kanada, Ken; Watanabe, Tsutomu; Onari, Seiichiro; Tanaka, Yukio.

In: Journal of Physics and Chemistry of Solids, Vol. 69, No. 12, 12.2008, p. 3334-3336.

Research output: Contribution to journalArticle

Kanada, Ken ; Watanabe, Tsutomu ; Onari, Seiichiro ; Tanaka, Yukio. / Exact diagonalization study on the extended Hubbard model in an anisotropic triangular lattice. In: Journal of Physics and Chemistry of Solids. 2008 ; Vol. 69, No. 12. pp. 3334-3336.
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