Author/Editor		Čepič, Mojca; Žekš, Boštjan
Title		Flexoelectricity and piezoelectricity: the reason for the rich variety of phases in antiferroelectric smectic liquid crystals
Type		članek
Source		Phys Rev Lett
Vol. and No.		Letnik 87
Publication year		2001
Volume		str. 085501-4
Language		eng
Abstract		The free energy of antiferroelectric smectic liquid crystals which takes into account polar order explicitly is presented. Steric, van der Waals, piezoelectric, and Hexoelectric interactions to the nearest layers, and dipolar electrostatic interactions to the nearest and to the next-nearest layers, induce indirect tilt interactions with chiral and achiral properties, which extend to the third- and to the fourth-nearest layers. Although the strength of microscopic interactions changes monotonically with decreasing temperature, the effective interlayer interactions change nonmonotonically and give tise to a nonmonotonic change of the modulation period through various phases. Increased chirality changes the phase sequence.
Descriptors		BIOPHYSICS CRYSTALLIZATION ELECTROMAGNETIC FIELDS MODELS, THEORETICAL