论文标题
具有磁性夹杂物的列液晶中双轴性的出现：某些理论见解
Emergence of Biaxiality in Nematic Liquid Crystals with Magnetic Inclusions: Some Theoretical Insights
论文作者
论文摘要
在1970年代预测之后的几十年中，列明液晶中的双轴相一直难以捉摸。 Liu等人实现了最近的实验突破。 [PNAS 113，10479（2016）]在带有磁性纳米颗粒（MNP）的液晶培养基中。他们利用了偶极性和磁性纽扣相互作用的不同长度尺度，以获得平衡状态，其中磁矩与列直导导管的角度成一定角度。这种倾斜引入了两个组件系统中的方向排序或双轴性的第二个杰出方向。使用粗粒颗粒的金茨堡 - 兰道自由能模型，我们提供了一个理论框架，该框架可以操纵形态和双轴顺序的定量估计值。
The biaxial phase in nematic liquid crystals has been elusive for several decades after its prediction in the 1970s. A recent experimental breakthrough was achieved by Liu et al. [PNAS 113, 10479 (2016)] in a liquid crystalline medium with magnetic nanoparticles (MNPs). They exploited the different length scales of dipolar and magneto-nematic interactions to obtain an equilibrium state where the magnetic moments are at an angle to the nematic director. This tilt introduces a second distinguished direction for orientational ordering or biaxiality in the two-component system. Using coarse-grained Ginzburg-Landau free energy models for the nematic and magnetic fields, we provide a theoretical framework which allows for the manipulation of morphologies and quantitative estimates of biaxial order.
