Abstract:We present and analyze a model for the combination of bulk and surface electroclinic effects in the smectic-A* (Sm-A*) phase near a Sm-A*-Sm-C* transition. As part of our analysis we calculate the dependence of the surface tilt on external electric field and show that it can be eliminated, or even reversed from its zero-field value, as demonstrated in previous experimental work on a system (W415) with a continuous Sm-A*-Sm-C* transition. We also analyze, for the first time, the combination of bulk and surface … Show more
“…Using Monte Carlo simulations they demonstrated that polarization as a function of the electric field follows the sigmoidal response for a liquid crystal compound W530 and this feature is attributed to the steric interactions inbuilt in a hollow cone of the de Vries smectic − A * phase. The model suggested by Zappitelli et al [32] considers both bulk and surface electroclinic effects in the Sm-A * phase and analyzes the tilt-dependent layer spacing and the effect of applied electric field on the layer spacing for de Vries smectics exhibiting the first-order Sm-A * to Sm-C * transition. These have a low orientational order parameter in agreement with our experimental findings.…”
Section: B Recent Models Of De Vries Smecticsmentioning
“…Using Monte Carlo simulations they demonstrated that polarization as a function of the electric field follows the sigmoidal response for a liquid crystal compound W530 and this feature is attributed to the steric interactions inbuilt in a hollow cone of the de Vries smectic − A * phase. The model suggested by Zappitelli et al [32] considers both bulk and surface electroclinic effects in the Sm-A * phase and analyzes the tilt-dependent layer spacing and the effect of applied electric field on the layer spacing for de Vries smectics exhibiting the first-order Sm-A * to Sm-C * transition. These have a low orientational order parameter in agreement with our experimental findings.…”
Section: B Recent Models Of De Vries Smecticsmentioning
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