Computer Simulation Studies of Anisotropic Systems. VII. Pretransitional Effects in Nematogens
Abstract
We have studied the pretransitional behaviour at the nematicisotropic transition for two systems by simulating the secondrank Kirkwood gfactor in the isotropic phase using the Monte Carlo technique. The LebwohlLasher model was used for one nematogen while for the other the simple anisotropic intermolecular potential was replaced by a truncated dispersion potential. The simulated g_2factor is found to diverge for both potentials as the nematicisotropic transition is approached, in accord with the anticipated increase in angular correlations. The divergence in g_2 observed for the two anisotropic potentials is compared with experiment and with the predictions of the Landaude Gennes theory. The best agreement for both theory and experiment is found for g_2 simulated with the simple potential.
 Publication:

Proceedings of the Royal Society of London Series A
 Pub Date:
 August 1982
 DOI:
 10.1098/rspa.1982.0103
 Bibcode:
 1982RSPSA.382..307H