Phys. Rev. Lett. 98, 247202 (2007) [4 pages]Quantum Spin Nematics, Dimerization, and Deconfined Criticality in Quasi-1D Spin-One MagnetsReceived 19 January 2007; revised 3 March 2007; published 13 June 2007 We study theoretically the destruction of spin nematic order due to quantum fluctuations in quasi-one-dimensional spin-1 magnets. If the nematic ordering is disordered by condensing disclinations, then quantum Berry phase effects induce dimerization in the resulting paramagnet. We develop a theory for a Landau-forbidden second order transition between the spin nematic and dimerized states found in recent numerical calculations. Numerical tests of the theory are suggested. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.247202
DOI:
10.1103/PhysRevLett.98.247202
PACS:
75.10.Jm, 71.27.+a, 75.30.Kz
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