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.
Grover
Tarun
T
Center for Condensed Matter Theory, Indian Institute of Science, Bangalore, India 560012.
Senthil
T
T