Osipov, M.A. and Gorkunov, M.V. (2008) Ferroelectric ordering in chiral smectic C* liquid crystals determined by nonchiral intermolecular interactions. Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 77 (3). 031701/1031701/13. ISSN 1063651X

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Abstract
General microscopic mechanism of ferroelectric ordering in chiral smecticC* liquid crystals is considered. It is shown that if the mesogenic molecules have a sufficiently low symmetry, the spontaneous polarization is proportional to one of the biaxial vector order parameters of the smecticC phase. This order parameter may be determined by intermolecular interactions which are not sensitive to molecular chirality. At the same time, the polarization is also proportional to a pseudoscalar parameter which vanishes if the molecules are nonchiral. The general statistical theory of ferroelectric ordering is illustrated by two particular models. The first model is based on electrostatic quadrupolequadrupole interactions, and it enables one to obtain explicit analytical expressions for the spontaneous polarization. In the second model, the molecular chirality and polarity are determined by a pair of offcenter nonparallel dipoles. For this case, the spontaneous polarization is calculated numerically as a function of temperature. The theory provides a more general interpretation of the previous approaches including the classical Boulder model.
Item type:  Article 

ID code:  6480 
Keywords:  ferroelectric ordering, chiral smecticC*, liquid crystals, mesogenic molecules, biaxial vector, polarization, Plasma physics. Ionized gases, Physics, Physics and Astronomy(all), Mathematical Physics, Statistical and Nonlinear Physics, Condensed Matter Physics 
Subjects:  Science > Physics > Plasma physics. Ionized gases Science > Physics 
Department:  Faculty of Science > Mathematics and Statistics Faculty of Science > Mathematics and Statistics > Mathematics 
Depositing user:  Miss Darcy Spiller 
Date Deposited:  08 Jul 2008 
Last modified:  27 Mar 2015 01:43 
URI:  http://strathprints.strath.ac.uk/id/eprint/6480 
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