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Freedericksz Transition in a Nematic Cell with Periodic Anchoring Energy in Electric Field

机译:在电场中具有周期性锚定能量的向列细胞中的Freedericksz跃迁

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The threshold value and shape of the spatially inhomogeneous threshold distribution of the director in an electric field in a planar nematic cell with periodic polar nematic anchoring energy with the cell surface have been determined. It is shown that the threshold value depends nonmonotonically on the number of anchoring energy periods per cell length. An analytical expression for the Freedericksz transition threshold at small anchoring energy modulation amplitudes is obtained, and a numerical calculation of threshold values at large amplitudes is performed. The spatial period of the director structure arising at Freedericksz transition depends strongly on the ratio of Frank elastic constants (K-2/K-1) and the number of anchoring-energy modulation periods per cell length, but is hardly affected by the anchoring energy modulation amplitude.
机译:已经确定了在平面向列电池中电场中指向矢在空间上不均匀的阈值分布的阈值和形状,该平面向列电池具有周期性极性向列锚定能量与细胞表面。示出了阈值非单调地取决于每单元长度的锚定能量周期的数量。获得了锚固能量调制幅度较小时的Freedericksz过渡阈值的解析表达式,并对幅度较大时的阈值进行了数值计算。在Freedericksz跃迁处产生的指向矢结构的空间周期在很大程度上取决于Frank弹性常数(K-2 / K-1)的比率和每细胞长度的锚定能量调制周期数,但几乎不受锚定能量的影响调制幅度。

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