Publication Title

Physical Review E

Publication Date

5-24-2013

Document Type

Article

DOI

10.1103/PhysRevE.87.052503

Keywords

banana-shaped molecules, computer-simulation, order

Disciplines

Physics

Abstract

We develop a Landau theory for bend flexoelectricity in liquid crystals of bent-core molecules. In the nematic phase of the model, the bend flexoelectric coefficient increases as we reduce the temperature toward the nematic to polar phase transition. At this critical point, there is a second-order transition from high-temperature uniform nematic phase to low-temperature nonuniform polar phase composed of twist-bend or splay-bend deformations. To test the predictions of Landau theory, we perform Monte Carlo simulations to find the director and polarization configurations as functions of temperature, applied electric field, and interaction parameters.

Comments

Copyright 2013 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevE.87.052503.


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