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.
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