Title:
|
Lattice-gas model of orientable molecules: Application to liquid crystals
|
Author:
|
Vives i Santa-Eulàlia, Eduard; Planes Vila, Antoni
|
Other authors:
|
Universitat de Barcelona |
Abstract:
|
We have analyzed a two-dimensional lattice-gas model of cylindrical molecules which can exhibit four possible orientations. The Hamiltonian of the model contains positional and orientational energy interaction terms. The ground state of the model has been investigated on the basis of Karl¿s theorem. Monte Carlo simulation results have confirmed the predicted ground state. The model is able to reproduce, with appropriate values of the Hamiltonian parameters, both, a smectic-nematic-like transition and a nematic-isotropic-like transition. We have also analyzed the phase diagram of the system by mean-field techniques and Monte Carlo simulations. Mean-field calculations agree well qualitatively with Monte Carlo results but overestimate transition temperatures. |
Subject(s):
|
-Transformacions de fase (Física estadística) -Dinàmica de gasos -Gas dynamics -Phase transformations (Statistical physics) |
Rights:
|
(c) The American Physical Society, 1988
|
Document type:
|
Article Article - Published version |
Published by:
|
The American Physical Society
|
Share:
|
|