HEDGEHOG ANNIHILATION IN A CONFINED NEMATIC LIQUID CRYSTAL

Annihilation of a pair of nematic point defects, having opposite strength is studied numerically. The defects are enclosed within an infinite cylindrical cavity whose lateral wall enforces strong homeotropic anchoring. The Lebwohl-Lasher lattice model is used. The dynamics of the system consisting o...

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Bibliographic Details
Published in:Molecular crystals and liquid crystals (Philadelphia, Pa. : 2003) Pa. : 2003), 2004-01, Vol.413 (1), p.43-51
Main Authors: Svetec, M., Brada[cbreve], Z., Kralj, S., [Zbreve]umer, S.
Format: Article
Language:English
Subjects:
annihilation
nematic liquid crystal
nucleation
point defects
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Summary:Annihilation of a pair of nematic point defects, having opposite strength is studied numerically. The defects are enclosed within an infinite cylindrical cavity whose lateral wall enforces strong homeotropic anchoring. The Lebwohl-Lasher lattice model is used. The dynamics of the system consisting of N > 10 5 molecules is studied using the Brownian molecular dynamics. We study pre-collision, collision and post-collision regimes. In the first regime the defects are well separated and are clearly distinguishable. Latter the core structures of defects strongly overlap and gradually decay into the defectless state.
ISSN:1542-1406
1563-5287
DOI:10.1080/15421400490432551