Soluble kagome Ising model in a magnetic field
Soluble kagome Ising model in a magnetic field
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DOI：
10.1103/physreve.71.046120
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发表时间：
2005-04-01
影响因子：
2.4
通讯作者：
Wu, FY
中科院分区：
文献类型：
--
作者：
Lu, WT;Wu, FY
在非零外磁场的存在下，精确求解了具有超交换作用的kagome晶格上的伊辛模型。该模型推广了Fisher在1960年提出的超交换模型，并根据自由费米子模型进行了分析。我们推导出了临界条件，并详细分析了它的热力学和磁学性质。发现系统在临界时呈现出具有对数奇异性的二阶跃迁。
An Ising model on the kagome lattice with superexchange interactions is solved exactly under the presence of a nonzero external magnetic field. The model generalizes the superexchange model introduced by Fisher in 1960 and is analyzed in light of a free-fermion model. We deduce the critical condition and present detailed analyses of its thermodynamic and magnetic properties. The system is found to exhibit a second-order transition with logarithmic singularities at criticality.