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Spin-Peierls states of quantum antiferromagnets on the $Ca V_4 O_9$ lattice

Subir Sachdev·N. Read
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Abstract

We discuss the quantum paramagnetic phases of Heisenberg antiferromagnets on the 1/5-depleted square lattice found in $Ca V_4 O_9$. The possible phases of the quantum dimer model on this lattice are obtained by a mapping to a quantum-mechanical height model. In addition to the ``decoupled'' phases found earlier, we find a possible intermediate spin-Peierls phase with spontaneously-broken lattice symmetry. Experimental signatures of the different quantum paramagnetic phases are discussed.

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Subir Sachdev, N. Read. 1996-04-23. Spin-Peierls states of quantum antiferromagnets on the $Ca V_4 O_9$ lattice. https://doi.org/10.1103/physrevlett.77.4800

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