Computer simulation study of a biaxial nematogenic lattice model associated with a three-dimensional lattice and involving dispersion interactions

✍ Scribed by Silvano Romano

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 530 KB
• Volume: 339
• Category: Article
• ISSN: 0378-4371
• DOI: 10.1016/j.physa.2004.04.049

✦ Synopsis

The present paper considers a biaxial nematogenic lattice model, involving particles of D 2h symmetry, whose centres of mass are associated with a three-dimensional simple-cubic lattice; the pair potential is deÿned by a London-De Boer-Heller dispersion interaction, restricted to nearest neighbours; to the best of our knowledge, this model has not previously been studied by simulation. On the other hand, upon isotropically averaging over the intermolecular unit vector, another interaction model is obtained (which, in turn, can be introduced in other ways and guises as well), extensively studied by Mean Field treatment and Monte Carlo simulation. We present here Monte Carlo simulation results, showing mild but recognizable di erences between the two models, actually equivalent at Mean Field level.