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Nematic and Cholesteric Liquid Crystal Structures in Cells with Tangential-Conical Boundary Conditions

1
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk 660036, Russia
2
Siberian Federal University, Krasnoyarsk 660041, Russia
*
Author to whom correspondence should be addressed.
Crystals 2019, 9(5), 249; https://doi.org/10.3390/cryst9050249
Received: 27 March 2019 / Revised: 7 May 2019 / Accepted: 9 May 2019 / Published: 14 May 2019
(This article belongs to the Special Issue Advances in Cholesteric Liquid Crystals)
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Abstract

Orientational structures formed in nematic and cholesteric layers with tangential-conical boundary conditions have been investigated. LC cells with one substrate specifying the conical surface anchoring and another substrate specifying the tangential one have been considered. The director configurations and topological defects have been identified analyzing the texture patterns obtained by polarizing microscope in comparison with the structures and optical textures calculated by free energy minimization procedure of director field and finite-difference time-domain method, respectively. The domains, periodic structures and two-dimensional defects proper to the LC cells with tangential-conical anchoring have been studied depending on the layer thickness and cholesteric pitch. View Full-Text
Keywords: liquid crystal; cholesteric; nematic; conical boundary conditions; orientational structure; director configuration; topological defect liquid crystal; cholesteric; nematic; conical boundary conditions; orientational structure; director configuration; topological defect
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Krakhalev, M.N.; Bikbaev, R.G.; Sutormin, V.S.; Timofeev, I.V.; Zyryanov, V.Y. Nematic and Cholesteric Liquid Crystal Structures in Cells with Tangential-Conical Boundary Conditions. Crystals 2019, 9, 249.

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