Dielectric shape dispersion and biaxial transitions in nematic liquid crystals

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Sonnet, A.M. and Virga, E.G. and Durand, G.E. (2003) Dielectric shape dispersion and biaxial transitions in nematic liquid crystals. Physical Review E: Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, 67 (6). ISSN 2470-0053 (http://dx.doi.org/10.1103/PhysRevE.67.061701)

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Abstract

Using two order tensors, we propose a mean-field model to describe the uniaxial and biaxial phases of nematogenic molecules presenting a shape dispersion of their biaxial dielectric susceptibility. We recover the classical isotropic-uniaxial-biaxial sequence of phases. The phase diagram exhibits a tricritical point, a feature that cannot be retraced in the other mean-field models established for molecules without shape dispersion.

ORCID iDs

Sonnet, A.M. ORCID logoORCID: https://orcid.org/0000-0003-2583-7897, Virga, E.G. and Durand, G.E.;
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