Two-dimensional anisotropic Heisenberg antiferromagnet in a magnetic field
Two-dimensional anisotropic Heisenberg antiferromagnet in a magnetic field
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磁场中的二维各向异性海森堡反铁磁体
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
R. Leidl
中科院分区：
文献类型：
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作者：
M. Holtschneider;W. Selke;R. Leidl
使用蒙特卡罗技术研究了平行于易轴的磁场中的经典方晶格单轴各向异性海森堡反铁磁体。该模型显示了长程有序反铁磁、代数有序自旋翻转和顺磁相。模拟表明，在相当低的温度下，窄的无序相介入有序相之间。结果与之前有关经典模型以及自旋 S=1/2 的量子变体的部分矛盾的发现进行了比较。
The classical, square lattice, uniaxially anisotropic Heisenberg antiferromagnet in a magnetic field parallel to the easy axis is studied using Monte Carlo techniques. The model displays a long-range ordered antiferromagnetic, an algebraically ordered spin-flop, and a paramagnetic phase. The simulations indicate that a narrow disordered phase intervenes between the ordered phases down to quite low temperatures. Results are compared to previous, partially conflicting findings on related classical models as well as the quantum variant with spin S=1/2.