双轴向列相液晶中畴壁的研究

Domain Walls in Bixial Nematic Liquid Crystals

利用双轴向列相液晶的连续体弹性理论研究畴壁,在双轴相中发现了9种不同的畴壁。这些畴壁的形状与单轴向列相中的畴壁相似。忽略展曲形变和弯曲形变之间的弹性各向异性,发现双轴相中的展-弯曲壁与扭曲壁有相似的解析解。通过对展-弯曲壁进行数值计算,发现弹性常数的比值会影响畴壁的宽度。

Within the framework of the continuum elastic theory of biaxial nematic liquid crystals,domain walls were studied.Nine different domain walls in biaxial nematics were found.The shapes of these walls are similar to those in uniaxial nematics.By neglecting the elastic anisotropy concerned with splay and bend distortions,it is found that the analytic solutions of splay-bend walls are similar to that of twist walls.The numerical solutions of splay-bend walls show that the ratio of the elastic constants affects the width of the walls.