Title :
Effect of the quadrupolar interactions on dielectric response of chiral smectic liquid crystals
Author :
T.Y. Tan;L.H. Ong;M. Cepic
Author_Institution :
School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
Abstract :
A discrete model is used to study the dielectric response of chiral smectic liquid crystals under the influence of external harmonic electric field. In this model, the order parameter is the tilt parameter xioarrj. which describes the magnitude and direction of the director ncirc in layer-j, where ncirc inclines at an angle to the smectic layer normal. The effect of quadrupolar interactions on dielectric loss of chiral smectic liquid crystal phases is calculated numerically. Analytical expressions for the dielectric loss in terms of eigen-frequencies of the phase and amplitude modes can be derived from the free energy expansion. Numerical results of frequency dependence of dielectric loss are also obtained.
Keywords :
"Liquid crystals","Dielectric liquids","Dielectric losses","Sliding mode control","Liquid crystal displays","Clocks","Physics education","Electrochemical impedance spectroscopy","Fluctuations","Frequency dependence"
Conference_Titel :
Applications of Ferroelectrics, 2009. ISAF 2009. 18th IEEE International Symposium on the
Electronic_ISBN :
2375-0448
DOI :
10.1109/ISAF.2009.5307616