Since November 1998, Viktor has been involved in a PhD project, sponsored
by D.E.R.A. (Malvern) and is currently completing his Thesis for submission.
The aim of the project is to study the phase behaviour of liquid crystals
(LCs) and LC mixtures using the Lebwohl-Lasher model along with
Monte Carlo method. It allows to explore the phase behaviour, order
parameter and structural changes in such systems and to compare the results
with theoretical and experimental approaches. The work relates to computer
simulations performed with the aim of promoting greater understanding
of the mechanisms responsible for phase behaviour in mesogenic materials.
Lattice models approximate physical systems using an array of interacting
"spins" whose locations are fixed on an underlying lattice. The Lebwohl-Lasher
lattice model of a liquid crystal, which is based on the simple Meier-Saupe
site-site interaction, captures much of the essential physics of the isotropic-nematic
transition. The basic model has been extended by incorporating two different
spin types.With this model, the temperature-concentration phase diagrams
for a range of coupling constants have been explored (More>>).
See also sections 'work profile.science' for physics
of LC; 'intersts.computers' for computer modelling
software of LC.