自发手征对称性破缺的液晶偏振调制不稳定性
Polarization modulation instability in liquid crystals with spontaneous chiral symmetry breaking
摘要：
我们提出了一个理论模型，它描述了极化调制和层起伏结构的B7相，并给出了相变从向斜铁电B2相的B7相的实验观察。该系统被驱动到调制相由于偏振展曲和倾斜的分子相对于近晶层法线之间的耦合。估计了调制波长和两个相反手性畴之间的壁的宽度。
英文摘要：
We present a theoretical model which describes the polarization modulated and layer undulated structure of the B7 phase and gives the phase transition from the synclinic ferroelectric B2 phase to the B7 phase as observed experimentally. The system is driven into the modulated phase due to the coupling between the polarization splay and the tilt of the molecules with respect to the smectic layer normal. The modulation wavelength and the width of the wall between two domains of opposite chirality are estimated.
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