Anchoring-mediated interaction of edge dislocations with bounding surfaces in confined cholesteric liquid crystals.
Anchoring-mediated interaction of edge dislocations with bounding surfaces in confined cholesteric liquid crystals.
复制标题
限域胆甾型液晶中边缘位错与边界表面的锚定介导的相互作用。
DOI：
10.1103/physrevlett.90.085503
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发表时间：
2003
影响因子：
8.6
通讯作者：
O. Lavrentovich
中科院分区：
文献类型：
--
作者：
I. Smalyukh;O. Lavrentovich
我们利用荧光共焦偏光显微镜观察了双折射液晶中的边缘位错。边界板处的表面锚固决定了缺陷的结构和行为。两种类型的板设置面内指向矢取向，但不同的类型相关联的锚定电位。具有强极性锚定和非零方位锚定的板排斥位错，而具有弱极性锚定和没有方位锚定的板允许位错通过边界逃逸。为了解释这一结果，我们提出了一个粗粒度的锚定模型。
We employ the fluorescent confocal polarizing microscopy to image edge dislocations in cholesteric liquid crystals. Surface anchoring at the bounding plates determines the structure and behavior of defects. Two types of plates set in-plane director orientation but differ in the type of associated anchoring potentials. Plates with strong polar anchoring and nonzero azimuthal anchoring repel the dislocations, while plates with weak polar anchoring and no azimuthal anchoring allow the dislocations to escape through the boundary. To explain the results, we propose a coarse-grained model of cholesteric anchoring.