title: Reversible chemical switching of a ferroelectric film.
abstract: According to recent experiments and predictions, the orientation of the polarization at the surface of a ferroelectric material can affect its surface chemistry. Here we demonstrate the converse effect: the chemical environment can control the polarization orientation in a ferroelectric film. In situ synchrotron x-ray scattering measurements show that high or low oxygen partial pressure induces outward or inward polarization, respectively, in an ultrathin PbTiO3 film. Ab initio calculations provide insight into surface structure changes observed during chemical switching.
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: R V
authors.initials: RV
authors.lastname: Wang
authors.forename: D D
authors.initials: DD
authors.lastname: Fong
authors.forename: F
authors.initials: F
authors.lastname: Jiang
authors.forename: M J
authors.initials: MJ
authors.lastname: Highland
authors.forename: P H
authors.initials: PH
authors.lastname: Fuoss
authors.forename: Carol
authors.initials: C
authors.lastname: Thompson
authors.forename: A M
authors.initials: AM
authors.lastname: Kolpak
authors.forename: J A
authors.initials: JA
authors.lastname: Eastman
authors.forename: S K
authors.initials: SK
authors.lastname: Streiffer
authors.forename: A M
authors.initials: AM
authors.lastname: Rappe
authors.forename: G B
authors.initials: GB
authors.lastname: Stephenson