INDIUM ADSORPTION ON THE AU(111) SURFACE AT ROOM-TEMPERATURE

Room-temperature studies to determine the growth mode of vapor-deposit ed indium on the Au(111) surface have been conducted using Auger elect ron spectroscopy, electron-energy-loss spectroscopy, low-energy electr on diffraction (LEED), and work-function change measurements. It was f ound that an alloy, AuIn2, forms from the onset of deposition and the alloy thickens a layer at a time. LEED results indicate the alloy is d isordered at the surface. Attenuation lengths for electrons in the all oy have been determined, as has the stoichiometry. Comparisons are mad e to Sn on Au(111), studied previously in this laboratory, and to an e arlier study of In on Au at low temperature.