title: Experimental and theoretical investigation of the electronic structure of Cu2O and CuO thin films on Cu(110) using x-ray photoelectron and absorption spectroscopy.
abstract: The electronic structure of Cu(2)O and CuO thin films grown on Cu(110) was characterized by X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS). The various oxidation states, Cu(0), Cu(+), and Cu(2+), were unambiguously identified and characterized from their XPS and XAS spectra. We show that a clean and stoichiometric surface of CuO requires special environmental conditions to prevent loss of oxygen and contamination by background water. First-principles density functional theory XAS simulations of the oxygen K edge provide understanding of the core to valence transitions in Cu(+) and Cu(2+). A novel method to reference x-ray absorption energies based on the energies of isolated atoms is presented.
authors: Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors: Peng
authors: P
authors: Jiang
authors: David
authors: D
authors: Prendergast
authors: Ferenc
authors: F
authors: Borondics
authors: Soeren
authors: S
authors: Porsgaard
authors: Lisandro
authors: L
authors: Giovanetti
authors: Elzbieta
authors: E
authors: Pach
authors: John
authors: J
authors: Newberg
authors: Hendrik
authors: H
authors: Bluhm
authors: Flemming
authors: F
authors: Besenbacher
authors: Miquel
authors: M
authors: Salmeron