Effect of Saddle-Splay Elasticity on Stability of Disclination Rings in Nematic Liquid Crystals  

作　　者：WANG Yu-Sheng YUAN Bao-He YANG Guo-Hong 

机构地区：[1]Department of Mathematics and Information Sciences, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450011, China [2]Department of Physics, Shanghai University, Shanghai 200444, China

出　　处：《Communications in Theoretical Physics》2008年第10期847-850,共4页理论物理通讯（英文版）

基　　金：the Natural Science Foundation of Shanghai Municipal Commission of Science and Technology under Grant No.04ZR14059;National Natural Science Foundation of China under Grant No.10575068

摘　　要：In this paper, the stability of disclination ring in nematie liquid crystals is studied. In the presence of saddle-splay elasticity （characterized by k24） the disclination ring has a universal equilibrium radius. Depending on the values of the saddle-splay constant k24, the universal equilibrium radius is altered. When k24 〉 0.92k （m = 1/2） and k24 〉 0.88k （m =-1/2）, the disclination will be a point rather than a ring, where k is the Frank elastic constant in the one-constant approximation.

关 键 词：director field topological defect free energy 

分 类 号：O189[理学—数学]