Spin Gap in Two-Dimensional Heisenberg Model for CaV4O9

Nobuyuki Katoh, Masatoshi Imada

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

We investigate the mechanism of spin gap formation in a two-dimensional model relevant to Mott insulators such as CaV4O9. From the perturbation expansion and quantum Monte Carlo calculations, the origin of the spin gap is ascribed to the four-site plaquette singlet in contrast to the dimer gap established in the generalized dimerized Heisenberg model.

Original languageEnglish
Pages (from-to)4105-4108
Number of pages4
JournalJournal of the Physical Society of Japan
Volume64
Issue number11
DOIs
Publication statusPublished - 1995 Jan 1
Externally publishedYes

Fingerprint

two dimensional models
dimers
insulators
perturbation
expansion

Keywords

  • CaVO
  • four-site plaquette singlet
  • spin gap

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Spin Gap in Two-Dimensional Heisenberg Model for CaV4O9 . / Katoh, Nobuyuki; Imada, Masatoshi.

In: Journal of the Physical Society of Japan, Vol. 64, No. 11, 01.01.1995, p. 4105-4108.

Research output: Contribution to journalArticle

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