Computer simulation study of a biaxial nematogenic lattice model associated with a two-dimensional lattice

Silvano Romano

Physica A: Statistical Mechanics and its Applications, 2004, vol. 339, issue 3, 491-510

Abstract: We report here the mean field (MF) and Monte Carlo (MC) simulation study of a nematogenic lattice model; it involves particles possessing D2h symmetry, whose centres of mass are associated with a two-dimensional square lattice, while particle orientations belong to ordinary three-dimensional space; the pair potential, restricted to their nearest neighbours, is defined by a London–De Boer–Heller dispersion interaction. Both MF and MC show the existence of a low-temperature biaxial phase, followed by a uniaxial one at higher temperature, probably surviving at all higher temperatures. In the biaxial region MF yields results in only qualitative agreement with MC; the agreement recognizably improves in the following uniaxial region, at higher temperatures.

Keywords: Liquid crystals; Nematics; Lattice models; Biaxiality (search for similar items in EconPapers)
Date: 2004
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:339:y:2004:i:3:p:491-510

DOI: 10.1016/j.physa.2004.04.050

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