We have investigated formation processes of the γ (√3 × √3) R30° (γ√3) reconstructed surface for the Au/Si (111) system by using Auger electron spectroscopy, reflection high energy electron diffraction and scanning tunneling microscopy. Depositing Au onto the Si (111) - (7 × 7) substrate at a temperature of 600°C, we have successfully obtained the well-defined γ√3 surface with a single domain, which is extremely flat at an atomic scale. On the basis of the analysis of the surface composition, we have demonstrated that one monolayer of Au constitutes the γ√3 surface. Furthermore, it has been revealed that excess Au atoms at the surface contribute not to the formation of the surface reconstruction but to that of the liquid islands of Au.
ASJC Scopus subject areas
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Electrical and Electronic Engineering