Unexpected field-induced phase transitions between ferrielectric and antiferroelectric liquid crystal structures.
Unexpected field-induced phase transitions between ferrielectric and antiferroelectric liquid crystal structures.
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亚铁电和反铁电液晶结构之间意外的场诱导相变。
DOI：
10.1103/physreve.77.010701
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
H. Gleeson
中科院分区：
文献类型：
--
作者：
S. Jaradat;P. Brimicombe;C. Southern;S. Siemianowski;E. DiMasi;M. Osipov;R. Pindak;H. Gleeson
液晶是有趣的电响应软物质系统。我们报告了以前未探索的一些受挫液晶相结构的场诱导变化，并从理论上描述了它们。具体来说，我们已经发现使用共振x射线散射，四层中间半晶相可以经历过渡到铁电（三层）相或铁电相，这取决于温度。我们利用电场对中间相的研究提供了一种方法来检验描述自组装流体中铁电性的理论。
Liquid crystals are intriguing electrically responsive soft matter systems. We report previously unexplored field-induced changes in the structures of some frustrated liquid crystal phases and describe them theoretically. Specifically, we have discovered using resonant x-ray scattering that the four-layer intermediate smectic phase can undergo either a transition to the ferrielectric (three-layer) phase or to the ferroelectric phase, depending on temperature. Our studies of intermediate phases using electric fields offer a way to test theories that describe ferroelectricity in self-assembling fluids.