Influence of director fluctuations on the electric-field phase diagrams of nematic liquid crystals
Influence of director fluctuations on the electric-field phase diagrams of nematic liquid crystals
复制标题
指向矢涨落对向列液晶电场相图的影响
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
N. V. Madhusudana
中科院分区：
文献类型：
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作者：
S. Dhara;N. V. Madhusudana
我们首次报道了具有负介电各向异性的向列相液晶的高电场相图。准向列相转变温度(TPn)的变化基本上与|E|呈线性关系，而Landau-de Gennes理论则预测为二次变化。我们认为，磁场对指向矢涨落的猝灭对相变的热力学有重要贡献。
We report the first experimental high–electric-field phase diagram of a nematic liquid crystal with negative dielectric anisotropy. The variation of the paranematic-nematic transition temperature (TPN) is essentially linear with |E|, whereas the Landau-de Gennes theory predicts a quadratic variation. It is argued that the quenching of director fluctuations by the field contributes significantly to the thermodynamics of the transition.