Oxygen adsorption on Cu/ZnO(0001)-Zn

Lazcano, P; Batzill, M; Diebold, U; Haberle, P.


We hereby describe the modifications induced in a Cu thin film induced by different oxidation processes. By using plasma assisted deposition, we have adsorbed oxygen onto the Cu ZnO (0001)-Zn surface. Cu was deposited on the sputtered-annealed ZnO substrate at room temperature, which was later exposed to oxygen. Using x-ray photoelectron spectroscopy, we verified the effect of the surface treatment on the electronic structure. Our findings are consistent with a partially oxidized Cu layer, with the CuO located at the interface between ZnO and the adsorbed Cu islands. Further Cu deposition induces the formation of Cu2 O as judged by the evolution of the spectra. Annealing the sample up to 750°C in UHV induces further reduction of the oxide, metallic Cu is recovered on the top layer, with evidence of Cu desorption into the vacuum or incorporation into the substrate. © 2008 The American Physical Society.

Más información

Título según WOS: Oxygen adsorption on Cu/ZnO(0001)-Zn
Título según SCOPUS: Oxygen adsorption on Cu ZnO (0001) -Zn
Título de la Revista: PHYSICAL REVIEW B
Volumen: 77
Número: 3
Editorial: American Physical Society
Fecha de publicación: 2008
Idioma: English
URL: http://link.aps.org/doi/10.1103/PhysRevB.77.035435