title: Faceted monodomains of liquid crystal smectic blue phases.
abstract: Smectic blue phases (BP(Sm)) are mesophases of thermotropic liquid crystals, which exhibit both three-dimensional orientational order, such as classical blue phases, and smectic positional order. The BP(Sm) phases appear as the three-dimensional counterpart of the twist grain boundary phases. By growing large faceted monocrystals of BP(Sm) phase, we provide, for the first time at the length scale of the lattice parameter, information on the symmetry of the orientational unit cell. This study leads us to suggest an orthorhombic structure, contrary to the previous results obtained by x-ray scattering at the length scale of the smectic order.
authors.affiliation: Laboratoire de Physique des Solides, UMR 8502, Université Paris-Sud, F-91405 Orsay Cedex, France.
authors.forename: Eric
authors.initials: E
authors.lastname: Grelet
authors.forename: Brigitte
authors.initials: B
authors.lastname: Pansu
authors.forename: Min-Hui
authors.initials: MH
authors.lastname: Li
authors.forename: Huu Tinh
authors.initials: HT
authors.lastname: Nguyen