Schedule Oct 12, 2012
Spin Liquid Phase in Spin-1/2 J1-J2 Heisenberg Model on the Honeycomb Lattice
Shou-Shu Gong (Cal State Northridge)

Authors:Shou-Shu Gong1, D. N. Sheng1, Olexei I. Motrunich2, Matthew P. A. Fisher3

Department of Physics and Astronomy, California State University, Northridge1
Department of Physics, California Institute of Technology2
Department of Physics, University of California, Santa Barbara3

The spin-1/2 J1-J2 Heisenberg model on the honeycomb lattice is studied by the density matrix renormalization group (DMRG) directly employing the SU(2) spin rotation symmetry and the variational Monte Carlo (VMC) simulations. We determine a quantum phase diagram and find a Neel phase for small J2/J1<0.17 and a staggered dimer phase for large J2/J1>0.35. In the intermediate region 0.17

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