TL;DR
This paper develops a statistical theory to model the flexoelectric effect in liquid crystals, analyzing how molecular dipole moments influence polarization and elastic properties across different molecular shapes.
Contribution
It introduces a microscopic model linking dipole moments to flexoelectric coefficients and explores temperature-dependent behaviors in wedge-shaped and banana-shaped molecules.
Findings
FE coefficients proportional to dipole moment component along symmetry axis
Temperature dependence of order parameters and elastic constants calculated
Microscopic understanding of FE effect origins in liquid crystals
Abstract
The statistical theory of the dipole flexoelectric (FE) polarization in liquid crystals is used to calculate the temperature dependence of order parameters, the elastic constants and the FE coefficients. Two systems with polar wedge-shaped and banana-shaped molecules are investigated. In both cases the FE coefficients are proportional to the dipole moment component parallel to the molecule symmetry axis. The origin of the FE effect and microscopic pictures of the distorted phases are discussed.
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