Comment on "The Limits of Flexoelectricity in Liquid Crystals"
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منابع مشابه
Statistical mechanics of splay flexoelectricity in nematic liquid crystals.
We develop a lattice model for the splay flexoelectric effect in nematic liquid crystals. In this model, each lattice site has a spin representing the local molecular orientation, and the interaction between neighboring spins represents pear-shaped molecules with shape polarity. We perform Monte Carlo simulations and mean-field calculations to find the behavior as a function of interaction para...
متن کاملStatistical mechanics of bend flexoelectricity and the twist-bend phase in bent-core liquid crystals.
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 c...
متن کاملCompetition of elasticity and flexoelectricity for bistable alignment of nematic liquid crystals on patterned substrates.
We show that patterned surfaces can promote bistable configurations of nematics for reasons other than the symmetry of the surface. Numerical and analytical calculations reveal that a nematic liquid crystal in contact with a striped surface is subject to the competing aligning influences of elastic anisotropy, differing energy cost of various types of deformation, and flexoelectricity, curvatur...
متن کاملGiant flexoelectricity of bent-core nematic liquid crystals.
Flexoelectricity is a coupling between orientational deformation and electric polarization. We present a direct method for measuring the flexoelectric coefficients of nematic liquid crystals (NLCs) via the electric current produced by periodic mechanical flexing of the NLC's bounding surfaces. This method is suitable for measuring the response of bent-core liquid crystals, which are expected to...
متن کاملShear electricity in cholesterics
2014 From symmetry considerations it is possible to deduce that velocity gradients ought to induce electric polarizations in cholesteric liquid crystals. We show that flexoelectricity can be responsible for such a phenomenon. LE JOURNAL DE PHYSIQUE TOME 39, JUIN 1978, Classification Physics Abstracts 61.30 77.60
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تاریخ انتشار 2016