| 具有长程相互作用XXZ铁磁体链的热力学性质 |
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| 引用本文： | 李嘉亮,类淑国.具有长程相互作用XXZ铁磁体链的热力学性质[J].安徽大学学报(自然科学版),2008,32(1):53-57. |
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| 作者姓名： | 李嘉亮 类淑国 |
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| 作者单位： | 常熟理工学院,物理与电子科学系,江苏,常熟,215500;南京工业大学,应用物理系,江苏,南京,210009;南京工业大学,应用物理系,江苏,南京,210009 |
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| 摘 要： | 采用平均场Jordan-Wigner变换分析,研究外场中且具有Z方向均匀长程相互作用自旋-1/2 XXZ铁磁体链的热力学性质,得到了系统的亥姆赫兹自由能、内能、比热、磁化强度、磁化率等热力学量的解析表达式及其数值解,并讨论了有限温度时系统的相变.在退化条件下的结果与其他文献的结果相符.
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| 关 键 词： | Heisenberg XXZ铁磁体链 平均场Jordan-Wigner变换 长程相互作用 |
| 文章编号： | 1000-2162（2008）01-0053-05 |
| 收稿时间： | 2007-09-03 |
| 修稿时间： | 2007年9月3日 |
Thermodynamic properties of the XXZ ferromagnetic chain with long- range interactions |
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| LI Jia-liang,LEI Shu-guo.Thermodynamic properties of the XXZ ferromagnetic chain with long- range interactions[J].Journal of Anhui University(Natural Sciences),2008,32(1):53-57. |
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| Authors: | LI Jia-liang LEI Shu-guo |
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| Abstract: | The one-dimensional spin-1/2 Heisenberg XXZ ferromagnetic chain with uniform long-range interactions among the z components of the spins in the transverse field was studied by using the mean-field Jordan-Wigner transformation.The analytic expressions and the numerical results of the thermodynamic quantities,including the Helmholtz free energy,internal energy,specific heat,magnetization and isothermal susceptibility,were obtained.We also discussed the phase transitions of the system at a finite temperature.Our results agreed with that from other literatures in the degenerate condition. |
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| Keywords: | XXZ ferromagnetic chain mean-field Jordan-Wigner transformation long-range interactions |
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