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VOLUME 81 (2005) | ISSUE 2 | PAGE 89
Quantum dimer model for trimerized kagoméantiferromagnet
PACS: 75.10.Jm, 75.50.Ee
Abstract
Low-energy singlet states of a spin-1/2 trimerized kagoméantiferromagnet are mapped to an effective quantum dimer model on a triangular lattice. Mapping is done in the first-order of perturbation theory in a weaker coupling constant of the trimerized model. The derived quantum dimer model is dominated by kinetic energy terms (dimer resonances) on a few shortest loops of the triangular lattice.