Spin Gap in Two-Dimensional Heisenberg Model for CaV$_4$O$_9$

Preprint

11 October 1995

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9510049

Abstract

We investigate the mechanism of spin gap formation in a two-dimensional model relevant to Mott insulators such as CaV$_4$O$_9$. 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.

Keywords

DIMENSIONAL HEISENBERG
GENERALIZED DIMERIZED
HEISENBERG MODEL
MONTE CARLO
SPIN GAP
MODEL
CAV

All Related Versions

Version 1, 1995-10-11, ArXiv
Published version: Journal of the Physics Society Japan, 64 (11), 4105.

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