title: Antiferrodistortive reconstruction of the PbTiO(3)(001) surface.
abstract: We present in situ x-ray scattering measurements of the surface structures of PbTiO(3) (001) in equilibrium with PbO vapor. At 875 to 1025 K, a reconstruction having c(2x2) symmetry is present under most conditions, while a 1 x 6 reconstruction occurs under PbO-poor conditions. The atomic structure of the c(2x2) phase is found to consist of a single layer of an antiferrodistortive structure with oxygen cages counter-rotated by 10 degrees about the titanium ions.
authors.affiliation: Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: A
authors.initials: A
authors.lastname: Munkholm
authors.forename: S K
authors.initials: SK
authors.lastname: Streiffer
authors.forename: M V
authors.initials: MV
authors.lastname: Ramana Murty
authors.forename: J A
authors.initials: JA
authors.lastname: Eastman
authors.forename: Carol
authors.initials: C
authors.lastname: Thompson
authors.forename: O
authors.initials: O
authors.lastname: Auciello
authors.forename: L
authors.initials: L
authors.lastname: Thompson
authors.forename: J F
authors.initials: JF
authors.lastname: Moore
authors.forename: G B
authors.initials: GB
authors.lastname: Stephenson