Numerical Analysis of Spin-1/2 Alternating Heisenberg-XY Antiferromagnet in One Dimension
Numerical Analysis of Spin-1/2 Alternating Heisenberg-XY Antiferromagnet in One Dimension
复制标题
一维自旋 1/2 交替 Heisenberg-XY 反铁磁体的数值分析
DOI：
10.1143/jpsj.56.1132
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发表时间：
1987
影响因子：
1.7
通讯作者：
K. Okamoto
中科院分区：
文献类型：
--
作者：
H. Nishimori;K. Okamoto
用数值方法研究了具有类XY各向异性的自旋1/2交替海森堡模型.当键交替参数δ接近0时，该模型在基态表现出临界行为。估计了表征该基态临界点的临界指数。所得结果与中野和福山的分析计算结果符合得很好。对数校正的类型预测的黑色和金刚砂被发现是一致的数值数据在各向同性海森堡模型，但不是在各向异性模型。
The spin-1/2 alternating Heisenberg model with X Y -like anisotropy is studied by numerical methods. This model exhibits critical behavior in the ground state as the bond-alternation parameter δ approaches 0. The critical exponents characterizing this ground-state critical point are estimated. The results agree well with those of the analytical calculation of Nakano and Fukuyama. A logarithmic correction of the type predicted by Black and Emery is found to be consistent with numerical data in the isotropic Heisenberg model but not in anisotropic models.