摘要翻译：
应用基态和蒙特卡罗技术，分析了正方形晶格上沿易轴场中的经典单轴各向异性Heisenberg和XY反铁磁体。已知的模型显示反铁磁和自旋翻转相。在Heisenberg情况下，单离子各向异性被添加到XXZ反铁磁体中，增强或与单轴交换各向异性竞争。研究了它对双锥型非共线结构稳定性的影响。在各向异性XY反铁磁体中，反铁磁体与自旋翻转相之间的过渡区主要由简并的双向涨落控制。观察到的相图与不存在单离子各向异性的XXZ反铁磁体的相图非常相似。
---
英文标题：
《Uniaxially anisotropic antiferromagnets in a field on a square lattice》
---
作者：
M. Holtschneider and W. Selke
---
最新提交年份：
2008
---
分类信息：

一级分类：Physics        物理学
二级分类：Statistical Mechanics        统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
--

---
英文摘要：
  Classical uniaxially anisotropic Heisenberg and XY antiferromagnets in a field along the easy axis on a square lattice are analysed, applying ground state considerations and Monte Carlo techniques. The models are known to display antiferromagnetic and spin-flop phases. In the Heisenberg case, a single-ion anisotropy is added to the XXZ antiferromagnet, enhancing or competing with the uniaxial exchange anisotropy. Its effect on the stability of non-collinear structures of biconical type is studied. In the case of the anisotropic XY antiferromagnet, the transition region between the antiferromagnetic and spin-flop phases is found to be dominated by degenerate bidirectional fluctuations. The phase diagram is observed to resemble closely that of the XXZ antiferromagnet without single-ion anisotropy.
---
PDF链接：
https://arxiv.org/pdf/801.3217