Spin Gap in Two-Dimensional Heisenberg Model for CaV4O9

Nobuyuki Katoh; Masatoshi Imada

doi:10.1143/JPSJ.64.4105

Spin Gap in Two-Dimensional Heisenberg Model for CaV₄O₉

Nobuyuki Katoh, Masatoshi Imada

Research output: Contribution to journal › Article › peer-review

75 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 language	English
Pages (from-to)	4105-4108
Number of pages	4
Journal	journal of the physical society of japan
Volume	64
Issue number	11
DOIs	https://doi.org/10.1143/JPSJ.64.4105
Publication status	Published - 1995 Nov
Externally published	Yes

Keywords

CaVO
four-site plaquette singlet
spin gap

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.64.4105

Cite this

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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.",

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