Dynamics of a +/- 1/2 defect pair in a confined geometry: A thin hybrid aligned nematic cell

	Dynamics of a +/- 1/2 defect pair in a confined geometry: A thin hybrid aligned nematic cell
	Lu, L. X. and Z. D. Zhang
	2015
发表期刊	Chinese Physics B
卷号	24 期号:2 页码:6
摘要	Confined geometry can change the defect structure and its properties. In this paper, we investigate numerically the dynamics of a dipole of +/- 1/2 parallel wedge disclination lines in a confined geometry: a thin hybrid aligned nematic (HAN) cell, based on the Landau-de Gennes theory. When the cell gap d is larger than a critical value of 12 xi (where xi is the characteristic length for order-parameter change), the pair annihilates. A pure HAN configuration without defect is formed in an equilibrium state. In the confined geometry of d <= 12 xi, the diffusion process is discovered for the first time and an eigenvalue exchange configuration is formed in an equilibrium state. The eigenvalue exchange configuration is induced by different essential reasons. When 10 xi < d <= 12 xi, the two defects coalesce and annihilate. The biaxial wall is created by the inhomogeneous distortion of the director, which results in the eigenvalue exchange configuration. When d <= 10 xi, the defects do not collide and the eigenvalue exchange configuration originates from the biaxial seeds concentrated at the defects.
收录类别	SCI ; EI
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/55341
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Lu, L. X. and Z. D. Zhang. Dynamics of a +/- 1/2 defect pair in a confined geometry: A thin hybrid aligned nematic cell[J]. Chinese Physics B,2015,24(2):6.
APA	Lu, L. X. and Z. D. Zhang.(2015).Dynamics of a +/- 1/2 defect pair in a confined geometry: A thin hybrid aligned nematic cell.Chinese Physics B,24(2),6.
MLA	Lu, L. X. and Z. D. Zhang."Dynamics of a +/- 1/2 defect pair in a confined geometry: A thin hybrid aligned nematic cell".Chinese Physics B 24.2(2015):6.

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