Ma. Osipov et D. Guillon, Molecular theory of ferroelectric ordering in enantiomeric mixtures of smectic-C* liquid crystals, PHYS REV E, 60(6), 1999, pp. 6855-6863
A molecular theory of ferroelectric ordering in smectic-C* Liquid crystals
composed of left and right enantiomers is developed taking into account the
effects of chiral discrimination. The recently observed nonlinear dependen
ce of the spontaneous polarization on the enantiomeric excess is explained
in the frame work of a molecular model that takes into consideration the st
rong electrostatic interaction between effective atomic charges in the chir
al centers of the two enantiomers. This nonlinear dependence is determined
by a difference of interaction energies between the pairs of chiral molecul
es with equal and opposite handedness, respectively. A relation between the
molecular structure of different ferroelectric smectics C* and the depende
nce of the polarization on the enantiomeric excess is discussed in detail.
[S1063-651X(99)10312-X].