Excited States at Interfaces of a Metal-Supported Ultrathin Oxide Film

Abstract

We report layer-resolved measurements of the \textit{unoccupied} electronic structure of ultrathin MgO films grown on Ag(001). The metal-induced gap states at the metal/oxide interface, the oxide band gap as well as a surface core exciton involving an image-potential state of the vacuum are revealed through resonant Auger spectroscopy of the Mg $K{L}_{23}{L}_{23}$ Auger transition. Our results demonstrate how to obtain new insights on \textit{empty} states at interfaces of metal-supported ultrathin oxide films.

arXiv comment5 pages, 4 figures

References in corpus (4)

• Ultrathin oxides: bulk-oxide-like model surfaces or unique films?
• Metal-Induced Gap States at Well Defined Alkali-Halide/Metal Interfaces
• Layer-resolved study of Mg atom incorporation at MgO/Ag(001) buried interface
• Induced Work Function Changes at Mg-doped MgO/Ag(001) Interfaces: a Combined Auger Electron Diffraction and Density Functional Study