电场作用下向列型电池的平衡构型

Aaron Allen, Xiaoyu Zheng
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引用次数: 0

摘要

在这项工作中,我们使用一维Oseen-Frank导向模型研究了电场作用下向列型pi-cell的平衡构型。在pi-cell中可以达到的平衡取向结构被称为张开、弯曲和扭曲。其中,弯曲和扭曲是拓扑等效的,可以随着电压的变化而相互转换。根据材料参数的不同,这种转变可以是连续的,也可以是突然的。另一方面,如果液晶具有正的介电各向异性,则在足够高的电压下,展布结构变得不对称。我们确定了这些阈值电压,并根据弹性常数和边界处的预倾斜角表征了跃迁的顺序。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Equilibrium configurations in a nematic pi-cell under an electric field
In this work, we study the equilibrium configurations in a nematic pi-cell under an electric field using the one-dimensional Oseen-Frank director model. The equilibrium orientational configurations that can be attained in a pi-cell are known as splay, bend, and twist. Among those, bend and twist are topologically equivalent and can be transitioned into one another as voltage varies. The transition can be continuous or abrupt depending on the material parameters. On the other hand, the splay configuration becomes asymmetric for sufficiently high voltages if the liquid crystal has a positive dielectric anisotropy. We determine those threshold voltages and characterize the order of transitions in terms of the elastic constants and the pretilt angle at the boundary.
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