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高自发极化对倾斜手性近晶型自由悬浮薄膜的缺陷结构和取向动力学的影响。

Effect of high spontaneous polarization on defect structures and orientational dynamics of tilted chiral smectic freely suspended films.

作者信息

Link Darren R, Chattham Nattaporn, Maclennan Joseph E, Clark Noel A

机构信息

Department of Physics, and Ferroelectric Liquid Crystal Materials Research Center, University of Colorado, Boulder, Colorado 80309-0390, USA.

出版信息

Phys Rev E Stat Nonlin Soft Matter Phys. 2005 Feb;71(2 Pt 1):021704. doi: 10.1103/PhysRevE.71.021704. Epub 2005 Feb 10.

Abstract

The director structure around topological defects and in 2pi walls in the two-dimensional orientation field of thin freely suspended films of tilted chiral smectic liquid crystal is observed to minimize splay of the spontaneous polarization. Concentric ring patterns in the director field unwind more slowly in higher polarization films. These experiments confirm that polarization space charge increases the effective elasticity of static polarization-splay distortions and that it attracts ionic charge, leading to an increase in the effective orientational viscosity of the director field.

摘要

在倾斜手性近晶型液晶的自由悬浮薄膜二维取向场中,围绕拓扑缺陷以及2π壁的指向矢结构被观察到可使自发极化的展曲最小化。在较高极化的薄膜中,指向矢场中的同心环图案展开得更慢。这些实验证实,极化空间电荷增加了静态极化展曲畸变的有效弹性,并且它吸引离子电荷,导致指向矢场的有效取向粘度增加。

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