Quantum spin nematics, dimerization, and deconfined criticality in quasi-1D spin-one magnets.
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.
Center for Condensed Matter Theory, Indian Institute of Science, Bangalore, India 560012.
Tarun
T
Grover
T
T
Senthil