Magnetism of a tetrahedral cluster spin-chain

Abstract

We discuss the magnetic properties of a dimerized and completely frustrated tetrahedral spin-1/2 chain. Using a combination of exact diagonalization and bond-operator theory the quantum phase diagram is shown to incorporate a singlet-product, a dimer, and a Haldane phase. In addition we consider one-, and two-triplet excitations in the dimer phase and evaluate the magnetic Raman cross section which is found to be strongly renormalized by the presence of a two-triplet bound state. The link to a novel tellurate materials is clarified.

8 pages, 8 figures

References in corpus (1)

• Observation of two-magnon bound states in the two-leg ladders of (Ca,La)14Cu24O41

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