title: Direct measurement of the attractive interaction forces on F0 color centers on MgO(001) by dynamic force microscopy.
abstract: Defect sites on oxide surfaces play a dominant role in surface chemistry. The direct atomistic study of these sites is important but very difficult. We have mimicked the adsorbate-defect interaction by a dynamic force microscope tip measuring the interaction with a color center (F(0)) on the MgO(001) surface. The experimental findings, complemented by density functional theory calculations, show a highly attractive adsorbate-defect interaction and a charge transfer at a critical distance.
authors.affiliation: Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: König
authors.forename: Georg H
authors.initials: GH
authors.lastname: Simon
authors.forename: Umberto
authors.initials: U
authors.lastname: Martinez
authors.forename: Livia
authors.initials: L
authors.lastname: Giordano
authors.forename: Gianfranco
authors.initials: G
authors.lastname: Pacchioni
authors.forename: Markus
authors.initials: M
authors.lastname: Heyde
authors.forename: Hans-Joachim
authors.initials: HJ
authors.lastname: Freund