Abstract
Textures created by point topological defects in defects in polar smectic films have been studied. Such defects have been created by the dynamic method (substance from a very thin film does not have time to approach its edges and thicker islands with a topological defect are controllably formed). Topological defects have been studied in smectic islands with a thickness of six to eight molecular layers in a film with a thickness of two molecular layers. Competition between two-dimensional orientational elasticity in islands and the orientation of the director at the boundary of smectic islands results in different configurations of the field of the c-director created by a topological defect. A transition between configurations occurs at a change in the dimension of islands and depends on the dipole polarization of a liquid crystal. The comparison of the numerical calculations of the structure of topological defects with experimental data has allowed determining the dependence of the anisotropy of the two-dimensional orientational elasticity on the polarization of smectic films.
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Original Russian Text © P.V. Dolganov, N.S. Shuravin, V.K. Dolganov, E.I. Kats, 2015, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2015, Vol. 101, No. 7, pp. 505–511.
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Dolganov, P.V., Shuravin, N.S., Dolganov, V.K. et al. Topological defects in smectic islands in freely suspended films. Jetp Lett. 101, 453–458 (2015). https://doi.org/10.1134/S0021364015070073
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DOI: https://doi.org/10.1134/S0021364015070073