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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 |
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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.
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Received: 07 February 2018
Revised: 09 March 2018
Accepted manuscript online:
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PACS:
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61.30.Jf
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(Defects in liquid crystals)
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64.70.M-
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(Transitions in liquid crystals)
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| Fund: 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. |
Corresponding Authors:
Zhi-Dong Zhang
E-mail: zhidong_zhang1961@163.com
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Cite this article:
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 2018 Chin. Phys. B 27 056103
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