| Dzyaloshinskii-Moriya作用对Blume-Capel模型热力学性质的影响 |
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| 引用本文： | 孙光厚,尹训昌,王殿元,吴杏华,潮兴兵.Dzyaloshinskii-Moriya作用对Blume-Capel模型热力学性质的影响[J].安庆师范学院学报(自然科学版),2009,15(2):18-19. |
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| 作者姓名： | 孙光厚 尹训昌 王殿元 吴杏华 潮兴兵 |
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| 作者单位： | 九江学院,理学院,江西,九江,332005;安庆师范学院,物理与电气工程学院,安徽,安庆,246133 |
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| 基金项目： | 九江学院科研项目，安徽省青年教师科研计划项目 |
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| 摘 要： | 应用二自旋集团平均场近似的方法，研究了蜂窝格子上具有Dzyaloshinskii--Moriya（DM）作用的Blume—Capel模型的临界性质，得到了该系统的相图。结果表明，此系统存在三临界点，并且三临界点不是随DM作用参量单调变化。系统的这种临界行为可以解释为交换耦合作用、晶体场作用和DM作用三者之间相互竞争的结果。
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| 关 键 词： | Blume-Capel模型 Dzyaloshinskii-Moriya作用 三临界点 二自旋集团平均场近似 |
Thermodynamic Effects of the Dzyaloshinskii-Moriya Interaction on the Blume-Capel Model |
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| SUN Guang-hou,YIN Xun-chang,WANG Dian-yuan,WU Xing-hua,CHAO Xing-bing.Thermodynamic Effects of the Dzyaloshinskii-Moriya Interaction on the Blume-Capel Model[J].Journal of Anqing Teachers College(Natural Science Edition),2009,15(2):18-19. |
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| Authors: | SUN Guang-hou YIN Xun-chang WANG Dian-yuan WU Xing-hua CHAO Xing-bing |
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| Affiliation: | 1.School of Science;Jiujiang University;Jiujiang 332005 |
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| Abstract: | Using the two—spin cluster mean—field method,the effects of the Dzyaloshinskii—Moriya interaction on the thermodynamic properties of the Blume—Capel model are investigated for the honeycomb lattice.The phase diagram of this system is obtained,and it is found that the system exhibits the tricritical point.The tricritical point does not monotonously change with the DM interaction increasing.The critical properties of the system may be interpreted as a result of a competition among the exchange interaction,the crystal field interaction and the DM interaction. |
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| Keywords: | Blume-Capel model Dzyloshinskii-Moriya interactions tricritical point two-spin cluster mean-field method |
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