Numerical Study of the Spin-Flop Transition in Anisotropic Spin-1/2 Antiferromagnets
arXiv:cond-mat/0111410 · doi:10.1103/PhysRevB.65.092402
Abstract
Magnetization processes of the spin-1/2 antiferromagnetic model in two and three spatial dimensions are studied using quantum Monte Carlo method based on stochastic series expansions. Recently developed operator-loop algorithm enables us to show a clear evidence of the first-order phase transition in the presence of an external magnetic field. Phase diagrams of closely related systems, hard core bosons with nearest-neighbor repulsions, are also discussed focusing on possibilities of phase-separated and supersolid phases.
4 pages, Revtex version 4, with 4 figures embedded, To appear in Phys. Rev. B
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