Lead growth on Si(111) surfaces reconstructed by indium.

We study the Pb growth on both √3 × √3-In and 4 × 1-In reconstructed Si(111) surfaces at room and low temperature (160 K). The study takes place with complementary techniques, to investigate the role of the substrate reconstruction and temperature in determining the growth mode of Pb. Specifically, we focus on the correlation between the growth morphology and the electronic structure of the Pb films.

Barium adsorption on the chemisorbed O(2 × 1)/Ni(110) surface.

Barium adsorption on the O(2 × 1)/Ni(110) surface has been studied by Auger electron spectroscopy and work function measurements in combination with photoemission measurements. The study was focused on the low coverage regime from submonolayer to double monolayer. The results show that during development of the first layer of Ba on the surface, a two-dimensional incomplete barium oxide layer, BaO, forms.