Toward a Detailed Understanding of Si(111)- Surface and Adsorbed Ge Nanostructures: Fabrications, Structures, and Calculations
Figure 7
Schematic top view of the calculated lowest
energy configurations of a Ge atom on the Si(111) surface: (a) Ge at a B2 site and the nearby Si adatom
at the position of its original site. (b) Ge at the
substitutional S4 site and the Si adatom at a B2 site. (c) Ge atoms substitute
for some of the Si adatoms and no atoms are bonded at any of the B2 sites. The bond lengths are
shown with unit of Å.