Biaxial modeling of the structure of the chevron interface in smectic liquid crystals.
Biaxial modeling of the structure of the chevron interface in smectic liquid crystals.
复制标题
近晶液晶中人字形界面结构的双轴建模。
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
S. Elston
中科院分区：
文献类型：
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作者：
N. Mottram;N. Ul;S. Elston
我们已经包括了固有的分子双轴性的近晶C相的模型中的人字形结构。这种分子双轴性与围绕分子长轴的受阻旋转有关，对于手性极性分子，该分子长轴诱导自发极化。通过双轴性和近晶锥角之间的耦合，在人字形界面处的分子分布的连续性导致锥角的变化。在一定的近似下，我们能够找到的人字形结构的解析表达式，从而估计的人字形接口的宽度。事实上，有两个相关长度决定了锥角和双轴度的变化。
We have included the inherent molecular biaxiality of the smectic C phase in a model of the chevron structure. This molecular biaxiality is related to a hindered rotation about the molecular long axis which for chiral, polar molecules induces a spontaneous polarization. Through the coupling between biaxiality and the smectic cone angle, continuity of the molecular distribution at the chevron interface leads to changes in the cone angle. Under certain approximations we are able to find analytic expressions for the chevron structure and consequently estimate the width of the chevron interface. There are in fact two correlation lengths which govern variations in the cone angle and the biaxiality.