论文标题
splay列阶段的理论：单与双震
Theory of the splay nematic phase: Single vs. double splay
论文作者
论文摘要
最近的实验报道了一个新型的nematic阶段，该阶段具有正面和负splay的交替域。为了建模这一阶段，先前的研究考虑了导演场的一维splay调制，并伴随着极阶的一维调制。当splay和极阶之间的挠性连接变得足够强，均匀的列状态变得不稳定，与调制相的形成不稳定。在这里，我们从一种新的液晶弹性方法来重新检查了该理论，该理论表明纯splay变形是双重的，而不是平面单个单张力。在这种推理之后，我们提出了一个带有2D席位的结构，并伴随着极性的2D调制，并表明2D结构通常具有比1D结构低的自由能。
Recent experiments have reported a novel splay nematic phase, which has alternating domains of positive and negative splay. To model this phase, previous studies have considered a 1D splay modulation of the director field, accompanied by a 1D modulation of polar order. When the flexoelectric coupling between splay and polar order becomes sufficiently strong, the uniform nematic state becomes unstable to the formation of a modulated phase. Here, we re-examine this theory in terms of a new approach to liquid crystal elasticity, which shows that pure splay deformation is double splay rather than planar single splay. Following that reasoning, we propose a structure with a 2D splay modulation of the director field, accompanied by a 2D modulation of polar order, and show that the 2D structure generally has a lower free energy than the 1D structure.
