直转扭曲：近晶相A中的挫折与手性
Straight round the twist: frustration and chirality in smectics-A.
作者信息
Matsumoto Elisabetta A, Kamien Randall D, Alexander Gareth P
机构信息
School of Physics, Georgia Institute of Technology, 837 State Street, Atlanta, GA 30309, USA.
Department of Physics and Astronomy, University of Pennsylvania, 209 S. 33rd Street, Philadelphia, PA, USA.
出版信息
Interface Focus. 2017 Aug 6;7(4):20160118. doi: 10.1098/rsfs.2016.0118. Epub 2017 Jun 16.
Frustration is a powerful mechanism in condensed matter systems, driving both order and complexity. In smectics, the frustration between macroscopic chirality and equally spaced layers generates textures characterized by a proliferation of defects. In this article, we study several different ground states of the chiral Landau-de Gennes free energy for a smectic liquid crystal. The standard theory finds the twist grain boundary (TGB) phase to be the ground state for chiral type II smectics. However, for very highly chiral systems, the hierarchical helical nanofilament phase can form and is stable over the TGB.
受挫是凝聚态物质系统中的一种强大机制，它推动着有序和复杂性。在近晶相中，宏观手性与等间距层之间的受挫会产生以大量缺陷为特征的织构。在本文中，我们研究了近晶型液晶的手性朗道 - 德热纳自由能的几种不同基态。标准理论发现扭曲晶界（TGB）相是II型手性近晶相的基态。然而，对于手性非常高的系统，分层螺旋纳米丝相可以形成并且比TGB相更稳定。
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