Ordering of the Si(5Â 5Â 3) surface with Pb atoms

The crystallographic structure and morphology of the Si(5 5 3) surface covered with Pb atoms are investigated with the reflection high energy electron diffraction (RHEED) technique. A regular distribution of steps over a macroscopic sample area is obtained after the adsorption of more than 1.3 monolayers Pb and subsequent annealing. The details of preparation of the ordered surface together with a diffraction model explaining the observed RHEED patterns are presented. The applied model predicts main diffraction features observed with RHEED and confirms the structural order of the surface.