Interaction between atomic and electronic structures of Mg films on the (1010) surface of the Re crystals

The electronic structure Mg films on the (1010) surface of the Re crystal has been studied by ultraviolet photoelectron spectroscopy (UPS) with hv=8.4 eV (UPS) and low-energy electronloss spectroscopy (LEELS).Changes in the UPS-spectra at Mg coverages 0<0.5 are caused by adsorption-induced states which are at 2.2 eV below Ep. At 0.0.5 the commensurate-incommensurate transition of the Mg film produces its metallization, which is exhibited in generation of the -0.8 eV peak in the UPS-spectrum and the surface plasmon peak in LEEL-spectra. The results are discussed in terms of a simple model of adsorption which suggests transitin from a strongly polar covalent bond between adatoms and a substrate at low 0 to metallic bond at the monolayer coverage