液晶界面自由能二维情形的两参数形式  

The Pattern of Two Parameters under Two Dimentions of Free Energyof the Liquid Crystal's Surface

作　　者：韩丽君[1] 

机构地区：[1]廊坊师范学院物理系,河北廊坊065000

出　　处：《廊坊师范学院学报》2001年第4期21-27,共7页Journal of Langfang Teachers College

摘　　要：分析了迄今关于锚定强度A的实验测量数据 ,指出Aθ 与Aφ 可能不相等 这意味着锚定自由能与界面法向有关 ,SLO公式 [Phys.Rev .E ,5 2 ,6 81(1995 ) ]需要修改 本文提出了新的锚定自由能公式 公式中出现两个强度参量 ,因而允许Aθ≠Aφ 按这个公式研究了弱锚定场控扭曲向列液晶盒 ,导出了阈值场强 。On the basis of analyzing the experimental data about anchoring energy strength till today,it is concluded that A and A may be unequal,which suggests that the anchoring energy depends on the normal direction of the surface.So the SLO expression(Phys.Rev.E,52,681(1995))should be modified.In this paper,a new expression of the anchoring energy in which there are two strength parameters is proposed,it permits A=A.By this expression,a field-controlled twisted chiral nematic slab with weak boundary coupling is researched,the equations which describe threshold field are derived,and some numerical calculation is made.

关 键 词：向列液晶 界面物理 锚定强度 Freedrieksz转变 

分 类 号：O469[理学—凝聚态物理]