| Union Jack晶格上伊辛模型的自由费密近似解 |
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| 引用本文： | 王福高,胡嘉桢. Union Jack晶格上伊辛模型的自由费密近似解[J]. 物理学报, 1993, 42(5): 853-858 |
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| 作者姓名： | 王福高 胡嘉桢 |
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| 作者单位： | 上海交通大学应用物理系凝聚态物理研究所,上海200030;上海交通大学应用物理系凝聚态物理研究所,上海200030 |
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| 摘 要： | 运用自由费密近似对Union Jack晶格上具有各向异性二体耦合作用及三体相互作用的伊辛模型进行了求解,得到了模型的自由能、自发磁矩和临界点方程。在耦合常数简化为正方晶格上的伊辛模型时,得到了与Onsager一致的解。
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| 关 键 词： | 米字晶格 伊辛模型 自由费密近似 |
| 收稿时间： | 1992-02-14 |
FREE-FERMION APPROXIMATE SOLUSION OF THE ISING MODEL ON UNION JACK LATTICE |
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| WANG FU-GAO and HU JIA-ZHEN. FREE-FERMION APPROXIMATE SOLUSION OF THE ISING MODEL ON UNION JACK LATTICE[J]. Acta Physica Sinica, 1993, 42(5): 853-858 |
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| Authors: | WANG FU-GAO and HU JIA-ZHEN |
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| Abstract: | In this paper,the Ising model with two-body anisotropic interactions and three-body interactions on union Jack lattice is solved by free-fermion approximation. We have obtained its free energy, spontaneous magnetisation and the equation of critical points. When the interaction coefficients are simplified as in a square lattice Ising model, the same solusion as Onsager's is obtained. |
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