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We study Heisenberg antiferromagnets on a diamond-like decorated squarelattice perturbed by further neighbor couplings. The second-order effectiveHamiltonian is calculated and the resultant Hamiltonian is found to be asquare-lattice quantum-dimer model with a finite hopping amplitude and norepulsion, which suggests the stabilization of the plaquette phase. Our recipefor constructing quantum-dimer models can be adopted for other lattices andprovides a route for the experimental realization of quantum-dimer models.

Exact Realization of a Quantum-Dimer Model in Heisenberg Antiferromagnets on a Diamond-Like Decorated Lattice