Fine structures of defect cores induced by elastic anisotropy and biaxiality in hybrid alignment nematics

doi:10.1088/1674-1056/27/5/056103

中国物理B ›› 2018, Vol. 27 ›› Issue (5): 56103-056103.doi: 10.1088/1674-1056/27/5/056103

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇下一篇

Fine structures of defect cores induced by elastic anisotropy and biaxiality in hybrid alignment nematics

Xuan Zhou(周璇), Si-Bo Chen(陈思博), Zhi-Dong Zhang(张志东)

1 Department of physics, Hebei University of Technology, Tianjin 300401, China;
2 School of Electronic and Information Engineering, Hebei University of Technology, Tianjin 300401, China;
3 Tianjin Key Laboratory of Electronic Materials and Devices, Tianjin 300401, China

收稿日期:2018-02-07 修回日期:2018-03-09 出版日期:2018-05-05 发布日期:2018-05-05
通讯作者: Zhi-Dong Zhang E-mail:zhidong_zhang1961@163.com
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos.11374087 and 11447179) and the Key Subject Construction Project of Hebei Province University,China.

Fine structures of defect cores induced by elastic anisotropy and biaxiality in hybrid alignment nematics

Xuan Zhou(周璇)¹, Si-Bo Chen(陈思博)^2,3, Zhi-Dong Zhang(张志东)¹

1 Department of physics, Hebei University of Technology, Tianjin 300401, China;
2 School of Electronic and Information Engineering, Hebei University of Technology, Tianjin 300401, China;
3 Tianjin Key Laboratory of Electronic Materials and Devices, Tianjin 300401, China

Received:2018-02-07 Revised:2018-03-09 Online:2018-05-05 Published:2018-05-05
Contact: Zhi-Dong Zhang E-mail:zhidong_zhang1961@163.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos.11374087 and 11447179) and the Key Subject Construction Project of Hebei Province University,China.

摘要/Abstract

摘要： Based on Landau-de Gennes theory and two-dimensional finite-difference iterative method, the spontaneous distortion in hybrid alignment nematic cells with M=±1/2 disclination lines is investigated by establishing two models. The fine structures of defect cores are described in the order space S²/Z₂. The joint action of elastic anisotropy (L₂/L₁) and biaxiality of defects induces the spontaneous twist distortion, accompanied by the movement of the defect center to the upper or lower plate. For each model, four mixed defect structures appear with the same energy, which are defined as energetically degenerated quadruple states.

关键词: Landau-de Gennes theory, elastic anisotropy, mixed defects, order space

Abstract: Based on Landau-de Gennes theory and two-dimensional finite-difference iterative method, the spontaneous distortion in hybrid alignment nematic cells with M=±1/2 disclination lines is investigated by establishing two models. The fine structures of defect cores are described in the order space S²/Z₂. The joint action of elastic anisotropy (L₂/L₁) and biaxiality of defects induces the spontaneous twist distortion, accompanied by the movement of the defect center to the upper or lower plate. For each model, four mixed defect structures appear with the same energy, which are defined as energetically degenerated quadruple states.

Key words: Landau-de Gennes theory, elastic anisotropy, mixed defects, order space

中图分类号: (Defects in liquid crystals)

61.30.Jf

64.70.M- (Transitions in liquid crystals)

周璇, 陈思博, 张志东. Fine structures of defect cores induced by elastic anisotropy and biaxiality in hybrid alignment nematics[J]. 中国物理B, 2018, 27(5): 56103-056103.

Xuan Zhou(周璇), Si-Bo Chen(陈思博), Zhi-Dong Zhang(张志东). Fine structures of defect cores induced by elastic anisotropy and biaxiality in hybrid alignment nematics[J]. Chin. Phys. B, 2018, 27(5): 56103-056103.

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Fine structures of defect cores induced by elastic anisotropy and biaxiality in hybrid alignment nematics

Fine structures of defect cores induced by elastic anisotropy and biaxiality in hybrid alignment nematics

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