The Influence of Electric Field on Liquid Crystal Structure in the  phase using the Discrete Model


Wong T. I.,1 Uthayakumar D.,1 Čepič M.,2 and Junaidah Osman1


1School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia

2Faculty of Education, University of Ljubljana, and

 Jožef Stefan Institute, Ljubljana, Slovenia





The Landau phenomenological free-energy expansion in its discrete form is used to describe the free energy of each layer of a ferroelectric (FE) and antiferroelectric (AF) liquid crystalline system.  In order to study systematically the effect of electric field on phases, a simple free-energy model based on a five-layer system is considered, which includes only the usual van der Waals, nearest-neighbour and next nearest-neighbour interactions. Using the finite-difference time domain technique, numerical simulation based on the discrete-form of Landau-Khalatnikov equations of motion is performed to analyze the influence of electric field on the system. Changes in the phase structure are presented.




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