液晶与显示2016，Vol.31Issue(8)：740-747,8.DOI:10.3788/YJYXS20163108.0740
对向列相液晶反转壁中＋1缺陷处挠曲电效应的理论分析
Theoretical analysis of the influence of flexoelectric effect on the +1 defect site in nematic inversion walls
摘要
Abstract
Based on the experimental phenomena of flexoelectric response at defect sites in nematic in-version walls conducted by Pramoda Kumar et al .,we gave the theoretical analysis using the Landau-de Gennes theory.When a direct-current electric field normal to the plane of substrate is applied to the parallel aligned nematic liquid crystal cell with weak anchoring,the rotation of ±1 defects in the nar-row inversion walls can be exhibited.The free energy of liquid crystal molecules around the +1 defect site was formulated and the electric field driven structural changes at the defect site characterized by polar and azimuthal angles of the local director were simulated.The results reveal that the deviation of azimuthal angle induced by flexoelectric effect are consistent with the switching of extinction brushes at the +1 defect obtained in the experiment conducted by Pramoda Kumar et al .关键词
液晶/挠曲电效应/+1 缺陷/Landau-de Gennes 理论Key words
liquid crystal/flexoelectric effect/±1 defect/Frank theory分类
数理科学引用本文复制引用
张辉,郑桂丽,田毅,张志东..对向列相液晶反转壁中＋1缺陷处挠曲电效应的理论分析[J].液晶与显示,2016,31(8):740-747,8.基金项目
国家自然科学基金(No．11374087,No．11304074) （No．11374087,No．11304074）
河北省自然科学基金(No．A2014202123,No． A2016202282) （No．A2014202123,No． A2016202282）
河北省教育厅项目(No．QN2014130,No．QN2015260) （No．QN2014130,No．QN2015260）
河北省高校重点学科资助Supported by National Natural Science Foundation of China (No．11374087,No．11304074) （No．11374087,No．11304074）
Natural Sci-ence Foundation of Hebei Province (No．A2014202123,No．A2016202282) （No．A2014202123,No．A2016202282）
Research Project of Hebei Education Department (No．QN2014130,No．QN2015260) （No．QN2014130,No．QN2015260）
Key Subject Construction Project of Hebei Province University （）
