Abstract
Using the approximative expression for the elastic energy density of the antiferroelectric (AF) liquid crystal the elastic self-energy of (π, b)-wedge-screw dispiration is estimated. Then the elastic interaction between (π, b)-wedge-screw dispiration and (2π)-wedge dischnation in AF liquid crystals is investigated. The attraction of dislocation part of dispiration with (2π)-wedge disclination can lead to the formation of (3π)-wedge-screw dispiration. When (2π)-wedge disclination is trapped by (2d)-screw dislocation the resulting (2π, 2d)-dispiration can dissociate into a pair of two (π, d)-dispirations.
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The authors express their thanks to Professors A. Fukuda, H. Takezoe, Dr. Y. Takanishi and to Dr. K. Miyachi for discussions concerning their experimental observations of (3π, d)-wedge-screw dispirations and (π, d)-twist-edge dispirations in AF structures. This work was supported by the grant No. 19062 from Acad. Sci. Cz. R. and also benefited by the grant No.: 202/93/155 from the Grant Agency of the Czech Republic.
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Lejček, L., Dvořák, V. Wedge-screw dispiration in smectic liquid crystals with antiferroelectric order. Czech J Phys 44, 703–716 (1994). https://doi.org/10.1007/BF01694841
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DOI: https://doi.org/10.1007/BF01694841