| 基于向列相液晶形变研究空间各向异性两体势 |
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| 引用本文： | 张艳君,张志东,崔建坡,魏怀鹏.基于向列相液晶形变研究空间各向异性两体势[J].液晶与显示,2006,21(3):201-205. |
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| 作者姓名： | 张艳君 张志东 崔建坡 魏怀鹏 |
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| 作者单位： | 1. 中国科学院,长春光学精密机械与物理研究所,吉林,长春,130033;中国科学院,研究生院,北京,100039;河北工业大学,理学院,天津,300130
2. 河北工业大学,理学院,天津,300130 |
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| 基金项目： | 河北省自然科学基金资助项目(No.103002)，河北省高校重点学科建设资助项目 |
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| 摘 要： | 基于分子两体势研究向列相液晶的形变。该两体势是空间各向异性的并且依赖于液晶的弹性常数。理论处理中假定具有理想向列序,这意味着分子长轴取向方向与液晶指向矢是重合的,而总自由能等于总相互作用能。通过解析形式研究3种基本的弗雷德里克兹转变,得到了势参数与弹性常数的又一关系。通过MonteCarlo模拟方法研究了新两体作用势所描写向列相的热力学性质。
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| 关 键 词： | 液晶形变 空间各向异性两体势 理想向列序 弗雷德里克兹转变 Monte Carlo模拟 |
| 文章编号： | 1007-2780(2006)03-0201-05 |
| 修稿时间： | 2005年8月28日 |
Spatially Anisotropic Pair Potential Based on Distortions for Nematic Liquid Crystals |
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| ZHANG Yan-jun,ZHANG Zhi-dong,CUI Jian-po,WEI Huai-peng.Spatially Anisotropic Pair Potential Based on Distortions for Nematic Liquid Crystals[J].Chinese Journal of Liquid Crystals and Displays,2006,21(3):201-205. |
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| Authors: | ZHANG Yan-jun ZHANG Zhi-dong CUI Jian-po WEI Huai-peng |
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| Abstract: | Distortions of nematic liquid crystals are studied based upon the molecular pair potential model which is spatially anisotropic and dependent on elastic constants of liquid crystals. The perfect nematic order is assumed in the theoretical treatment, that means the orientation of the molecular long axis coincides with the director of liquid crystal and the total free energy equals to the total interaction energy. Three kinds of the basic Freedericksz transition are investigated analytically and a new form of potential parameters related to the elastic constants K_i is obtained. The thermodynamic properties of nematics described as pair potential model are studied by Monte Carlo simulations. |
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