Dynamics of Antiferroelectric Liquid Crystals and V-Shaped Response

Abstract

In antiferroelectric smectic materials, various types of responses such as V-shaped, normal and abnormal ones have been observed at a transmittance of light, to the electric field. In order to elucidate the mechanism of the responses, dynamics of ANNNI model are studied under the alternating field. It is shown that the appearances of those responses depend not only on frustration due to the weakcned interaction but also on the frequency of the electric field and two relaxation times of the order parameter and surface polarization.