ELECTRON-SPECTROSCOPY STUDY OF THE CU SRTIO3(100) INTERFACE/

Interface formation of copper on both reduced and stoichiometric SrTiO 3(100) was investigated using photoemission (XPS, UPS), electron diffr action (LEED) and electron energy loss spectroscopy (HREELS). The grow th mode of Cu on both surfaces involves the formation of a 2D-like lay er and islands, but the thickness of the 2D-like layer and the number of islands is higher on the reduced substrate due to the higher number of defects. An analysis of the Auger parameter of Cu during growth de monstrates the strong interaction of Cu with SrTiO3. HREELS experiment s showed a strong influence of the impact scattering interaction from the changes in the spectra with coverage, and the importance of the tw o different terminations of the (100) surface.