The two-dimensional SU(N) quantum antiferromagnet, a generalization of the quantum Heisenberg model, is investigated by quantum Monte Carlo simulations. The ground state for N<or=4 is found to be of the Néel type with broken SU(N) symmetry, whereas it is of the Spin-Peierls type for N>or=5 with broken lattice translational invariance. Our computation of the magnetization and the dimerization order parameter shows the absence of the intermediate spin-liquid phase.

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TIME-REVERSAL SYMMETRY AND TIME-DEPENDENT PHYSICS

P. Sisterna

Foundations of Physics LettersJun 1, 20001 citation

Physica C Superconductivity

Broken time reversal invariance in the ground state—a Monte Carlo study

Shoudan Liang, Nandini Trivedi

Published Dec 1, 1989• 0 citations

Publisher

DOI: 10.1016/0921-4534(89)90771-5

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