1305.5553 (Kevin Slagle et al.)

Quantum Phase Transition between Z2 spin liquid and columnar Valence
Bond Crystals on a Triangular lattice    [PDF]

Kevin Slagle, Cenke Xu

We study the quantum phase transition between the columnar valence bond solid (VBS) order and the Z2 spin liquid on a triangular lattice. With a fully isotropic triangular lattice, we propose that this transition may belong to a 3d O(6)* universality class with a large anomalous dimension of the columnar VBS order parameter. On a distorted triangular lattice, the degeneracy between different columnar VBS orders is lifted, and the liquid-VBS quantum phase transition can reduce to a 3d XY* transition.

View original: http://arxiv.org/abs/1305.5553