paper

Emergent Haldane phase in the bilinear-biquadratic Heisenberg model on the square lattice

arXiv:1701.05142 · doi:10.1103/PhysRevB.95.180404

Abstract

Infinite projected entangled pair states simulations of the bilinear-biquadratic Heisenberg model on the square lattice reveal an emergent Haldane phase in between the previously predicted antiferromagnetic and 3-sublattice 120 magnetically ordered phases. This intermediate phase preserves SU(2) spin and translational symmetry but breaks lattice rotational symmetry, and it can be adiabatically connected to the Haldane phase of decoupled chains. Our results contradict previous studies which found a direct transition between the two magnetically ordered states.

5 pages, 4 figures, plus supplemental material

References in corpus (13)

Cited by in corpus (35)