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摘要翻译：
铁电近晶液晶中的分子取向涨落由于自发极化的发散而产生空间电荷。这些空间电荷与可移动离子相互作用，因此必须考虑取向和离子自由度的耦合动力学。以往关于铁电液晶自由生长薄膜的理论和光散射实验都没有包括这种耦合，这可能会使其定量结论失效。我们考虑了非常慢的离子动力学的最重要的情况，与快速的取向涨落相比，并着重于使用短的电场脉冲来猝灭取向涨落。我们发现由此引起的散射光强的变化一定包含了一个由准静态离子构型引起的项，这个项以前被忽略了。除了发展一般理论之外，我们还提出了一个简单的模型来证明这个附加项的作用。
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英文标题：
《Dynamics of the molecular orientation field coupled to ions in
two-dimensional ferroelectric liquid crystals》
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作者：
Robert A. Pelcovits, J.-B. Lee and R. B. Meyer
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最新提交年份：
2007
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分类信息：
一级分类：Physics 物理学
二级分类：Soft Condensed Matter 软凝聚态物质
分类描述：Membranes, polymers, liquid crystals, glasses, colloids, granular matter
膜，聚合物，液晶，玻璃，胶体，颗粒物质
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一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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英文摘要：
Molecular orientation fluctuations in ferroelectric smectic liquid crystals produce space charges, due to the divergence of the spontaneous polarization. These space charges interact with mobile ions, so that one must consider the coupled dynamics of the orientation and ionic degrees of freedom. Previous theory and light scattering experiments on thin free-standing films of ferroelectric liquid crystals have not included this coupling, possibly invalidating their quantitative conclusions. We consider the most important case of very slow ionic dynamics, compared to rapid orientational fluctuations, and focus on the use of a short electric field pulse to quench orientational fluctuations. We find that the resulting change in scattered light intensity must include a term due to the quasistatic ionic configuration, which has previously been ignored. In addition to developing the general theory, we present a simple model to demonstrate the role of this added term.
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PDF链接：
https://arxiv.org/pdf/708.2059
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