title: Antinematic orientational order produced by an extreme case of the generalized Straley lattice model.
abstract: We address here a special, extreme case of the quadratic pair interaction potential between classical, D(2h)-symmetric particles (the generalized Straley model) on a three-dimensional simple cubic lattice. The model involves predominant antinematic couplings and it has been studied by Monte Carlo simulation and a molecular field treatment. The obtained results show a second-order transition between the isotropic phase and the low-temperature one, exhibiting uniaxial antinematic order.
authors.affiliation: Dipartimento di Matematica F Casorati, Università di Pavia, via Ferrata 1, I-27100 Pavia, Italy.
authors.forename: Fulvio
authors.initials: F
authors.lastname: Bisi
authors.forename: Giovanni
authors.initials: G
authors.lastname: De Matteis
authors.forename: Silvano
authors.initials: S
authors.lastname: Romano