Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
School of Mathematical Sciences, Peking University, Beijing 100871, China.
Phys Rev E. 2019 Jan;99(1-1):012703. doi: 10.1103/PhysRevE.99.012703.
The bent-core liquid crystals (LCs) are highly regarded as the next-generation materials for electro-optic devices. The nematic (N) phase of these LCs possesses highly ordered smecticlike cybotactic clusters which are promising for electro-optic applications. We have studied a one-dimensional Landau-de Gennes model of spatially inhomogeneous order parameters for the N phase of bent-core LCs. We investigate the effects of spatial confinement and coupling (between these clusters and the surrounding LC molecules modeled by a coupling parameter γ) on the order parameters. The coupling is found to increase the cluster order parameter significantly, suggesting enhancement in cluster formation, and also predicts a transition to a phase with weak nematiclike ordering above the nematic supercooling temperature.
双轴液晶（LCs）被认为是电光器件的下一代材料。这些 LCs 的向列（N）相具有高度有序的类似近晶的微区，这对于电光应用很有前景。我们研究了双轴 LC 的 N 相的空间不均匀序参数的一维朗道-德热内模型。我们研究了空间限制和耦合（这些微区与周围 LC 分子通过耦合参数γ来建模）对序参数的影响。发现耦合显著增加了微区的序参数，表明微区的形成得到了增强，同时也预测了在向列过冷温度以上出现具有较弱向列有序的相的转变。
