Numerical study of the spin-flop transition in anisotropic spin-1/2 antiferromagnets
Numerical study of the spin-flop transition in anisotropic spin-1/2 antiferromagnets
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DOI：
10.1103/physrevb.65.092402
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发表时间：
2001-11
影响因子：
3.7
通讯作者：
S. Yunoki
中科院分区：
文献类型：
--
作者：
S. Yunoki
利用基于随机级数展开的量子Monte Carlo方法研究了二维和三维自旋1/2反铁磁$\mathrm{XXZ}$模型的磁化过程.最近开发的算子回路算法使我们能够显示出明确的证据，在外部磁场的存在下，一阶相变。相图密切相关的系统，硬核玻色子与最近邻排斥，也进行了讨论，侧重于相分离和超固相的可能性。
Magnetization processes of the spin-1/2 antiferromagnetic $\mathrm{XXZ}$ model in two and three spatial dimensions are studied using a quantum Monte Carlo method based on stochastic series expansions. A recently developed operator-loop algorithm enables us to show clear evidence of a 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 the possibilities of phase-separated and supersolid phases.