Ferroelectric Properties in Banana-Shaped Achiral Liquid Crystalline Molecular Systems

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Abstract
We investigated the ferroelectric behavior in novel ferroelectric liquid crystals consisting of banana-shaped achiral molecules. Under the application of a triangular-wave electric field, we observed a single peak corresponding to the switching current in the higher-order smectic ( SmX2) phase as well as the smectic A b ( SmA b ) phase, where ferroelectricity had been already reported. This result proves that the spontaneous polarization is switchable with a single hysteresis loop in SmX2 as well as in SmA b . We also discussed the dielectric behavior in both the phases.