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向列顺序重建的最新进展Recent advances on nematic order reconstruction |
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| 课程网址: | http://videolectures.net/clc2010_barberi_ranor/ |
| 主讲教师: | Riccardo Barberi |
| 开课单位: | 卡拉布里亚大学 |
| 开课时间: | 2010-08-05 |
| 课程语种: | 英语 |
| 中文简介: |  |
| 课程简介: | Investigations on Pi-cell, a sandwich cell with the director rotating by 180°, are demonstrating the possibility to obtain nematic transitions between two textures with different topologies, for instance between an untwisted state and a Pi-twisted one. Fast topological changes can be observed by means of suitable electric fields or by micro/nano-confinement in the nematic bulk or close to a boundary surface. A strong frustration, in fact, as in the case of a strong local distortion, can induce transient and/or local biaxial states inside a nematic calamitic phase and the resultant nematic dynamics demands a full Landau-de Gennes Q-tensor description. In this work, we present Q-tensor numerical models capable to describe the nematic order dynamics in full details, comparing theoretical results with experiments. We will also discuss as nematic order reconstruction close to a boundary surface with strong or infinite anchoring conditions can provide transitions equivalent to anchoring breaking. |
| 关 键 词: | 向列顺序动力学; 向列顺序重建; 拓扑结构 |
| 课程来源: | 视频讲座网 |
| 最后编审: | 2019-03-01：cwx |
| 阅读次数: | 56 |