Real-Space Determination of Atomic Structure of the Si(111)-3×3R30°-Au Surface by Low-Energy Alkali-Ion Scattering

Abstract
The Si(111)-3×3R30°-Au structure has been analyzed by low-energy alkali-ion-scattering spectroscopy. It has been derived that (1) Au triplet clusters form the 3×3R30° lattice and (2) the Si first layer of honeycomb structure lies slightly below the Au layer.