title: Charging of metal adatoms on ultrathin oxide films: Au and Pd on FeO/Pt(111).
abstract: We present a combined experimental (STM/scanning tunneling spectroscopy) and theoretical (density functional theory) study on the deposition of Au and Pd metal atoms on FeO/Pt(111) ultrathin films. We show that while the Pd atoms are only slightly oxidized, the Au atoms form positive ions upon deposition, at variance to a charge transfer into the Au atoms as observed for MgO/Ag(100). The modulation of the adsorption properties within the surface Moiré cell and the charging induce the formation a self-assembled array of gold adatoms on FeO/Pt(111), whereas Pd atoms are randomly distributed.
authors.affiliation: Dipartimento di Scienza dei Materiali, Università di Milano-Bicocca, via Cozzi, 53-20125 Milano, Italy.
authors.forename: Livia
authors.initials: L
authors.lastname: Giordano
authors.forename: Gianfranco
authors.initials: G
authors.lastname: Pacchioni
authors.forename: Jacek
authors.initials: J
authors.lastname: Goniakowski
authors.forename: Niklas
authors.initials: N
authors.lastname: Nilius
authors.forename: Emile D L
authors.initials: ED
authors.lastname: Rienks
authors.forename: Hans-Joachim
authors.initials: HJ
authors.lastname: Freund