Macroscopic order in a nematic liquid crystal: Perturbation by spontaneous director fluctuations
Macroscopic order in a nematic liquid crystal: Perturbation by spontaneous director fluctuations
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向列液晶中的宏观秩序：自发指向矢波动的扰动
DOI：
10.1103/physreve.91.062502
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发表时间：
2015
影响因子：
2.4
通讯作者：
Herbert Zimmermann
中科院分区：
文献类型：
--
作者：
Daichi Hamasuna;Rauzah Hashim;Atsuhiro Kasatani;Geoffrey R. Luckhurst;Akihiko Sugimura;Bakir A. Timimi;Herbert Zimmermann
研究了近正交电场和磁场作用下向列相导向器的动态取向。借助时间分辨的氚核磁共振谱发现，弛豫过程中的中间态是明显不均匀的。宏观秩序被扰乱了，尽管导演的初始状态和最终状态似乎基本上是一致的。然而，初态确实对中间态中指向矢的均匀性有很大的影响。我们发展了一个基于自发指向矢起伏效应的基本模型来解释这些不同寻常的核磁共振观测。
The dynamic alignment of the nematic director by near-orthogonal electric and magnetic fields has been investigated. The intermediate states during the relaxation process were found, with the aid of time-resolved deuterium NMR spectroscopy, to be markedly nonuniform. The macroscopic order was perturbed, although the initial and final states of the director appear to be essentially uniform. However, the initial state does have a profound influence on the uniformity of the director in the intermediate states. We have developed a fundamental model based on the effect of spontaneous director fluctuations to explain these unusual NMR observations.