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Influence of dipole-dipole correlations on the stability of the biaxial nematic phase in the model bent-core liquid crystal

Osipov, Mikhail and Pajak, Grzegorz (2012) Influence of dipole-dipole correlations on the stability of the biaxial nematic phase in the model bent-core liquid crystal. Journal of Physics: Condensed Matter, 24 (14). ISSN 0953-8984

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Abstract

A molecular theory of biaxial nematic ordering in the system of bent-core molecules has been developed in the two-particle cluster approximation which enables one to take into account short-range polar correlations determined by both electrostatic dipole-dipole interaction and polar molecular shape. All orientational order parameters and short-range correlation functions are calculated numerically as functions of temperature in the uniaxial and in the biaxial nematic phases, and the results are compared with the ones obtained in the mean-field approximation and in the cluster approximation but without taking into consideration the dipole-dipole interaction. It is shown that short-range polar correlations and, in particular, the dipole-dipole correlations dramatically increase the temperature of the transition into the biaxial nematic phase and enhancing its stability range. The results are also very sensitive to the value of the opening angle of a model bent-core molecule.

Item type: Article
ID code: 40667
Keywords: liquid crystal structure, polymers, soft matter, polar correlations, Physics, Mathematics, Materials Science(all), Condensed Matter Physics
Subjects: Science > Physics
Science > Mathematics
Department: Faculty of Science > Mathematics and Statistics
Related URLs:
Depositing user: Pure Administrator
Date Deposited: 02 Aug 2012 13:17
Last modified: 27 Mar 2014 10:24
URI: http://strathprints.strath.ac.uk/id/eprint/40667

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