ULTRATHIN-FILM OF CU ON ALPHA-FE2O3(0001)

Haematite alpha-Fe2O3(0001)-1X1 and a reconstructed (1X1)R30 similar t o surface were studied by low-energy electron diffraction (LEED), ultr aviolet photoelectron spectroscopy (UPS) and X-ray photoelectron spect roscopy (XPS). The possibility of the existence of gamma-Fe2O3(111) pa tches on the reconstructed surface obtained without Ar+ sputtering pre treatment is discussed. During the initial Cu growth on the substrate, the formation of Cu+ states was indicated by X-ray-induced Auger para meter observations. With increasing amounts of Cu, Cu(111) epitaxial g rowth occurred for both the above surfaces.