A medium-energy ion scattering study of the Si(111)(√3×√3)R30°- Pb (β-phase) surface

The Si(111)(√3×√3)R30°-Pb reconstruction has been studied using medium-energy ion scattering. The ion scattering data were taken from two different scattering geometries and compared with Monte Carlo simulations of the scattering curves, varying different structural parameters systematically until a suitable match between experiment and theory was obtained. A new structural model is proposed on the basis of these results.