Spin-Peierls states of quantum antiferromagnets on the $Ca{V}_4{O}_9$ lattice

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.

9 pages; 2 eps figures

References in corpus (3)

• Large N expansion for frustrated and doped quantum antiferromagnets
• Phase diagram of depleted Heisenberg model for CaV4O9
• Plaquette Resonating-Valence-Bond Ground State of CaV${}_4$O${}_9$

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