title: Bilayered smectic phase polymorphism in the dipolar Gay-Berne liquid crystal model.
abstract: We present computer simulations of the Gay-Berne model with a strong terminal dipole. We report the existence of different stable antiferroelectric interdigitated bilayered phases in this model with diverse in-plane organization. The occurrence of these phases depends crucially on the value of the molecular elongation kappa. For kappa=3 we find an interdigitated bilayered smectic-A phase (absent when there is no dipole) and a bilayered smectic-T (or crystal) with positional in-plane tetragonal ordering, different from the hexatic observed in the absence of the molecular dipole. For kappa=4, bilayered smectic-A and in-plane hexatic-ordered smectic-B (or crystal) phases are observed.
authors.affiliation: Departamento de Física Atómica, Molecular y Nuclear, Area de Física Teórica, Universidad de Sevilla, Apartado de Correos 1065, 41080 Sevilla, Spain.
authors.forename: Mohammed
authors.initials: M
authors.lastname: Houssa
authors.forename: Luis F
authors.initials: LF
authors.lastname: Rull
authors.forename: Jose M
authors.initials: JM
authors.lastname: Romero-Enrique