Bd. Yu et al., SCANNING-TUNNELING-MICROSCOPY IMAGES OF GE ADSORBED ON AN AS-COVERED SI(001) SURFACE, Physical review. B, Condensed matter, 50(19), 1994, pp. 14631-14634
We present scanning-tunneling-microscopy images that support the singl
e-dimer exchange mechanism proposed for surfactant-mediated epitaxial
growth of Ge on the Si(001) surface [Phys. Rev. Lett. 72, 3190 (1994)]
. Unusual features of the calculated images corresponding to the (meta
)stable geometries during the exchange process are bright spots betwee
n the dimer rows and their variation depending on the bias voltage. Th
e experimental image also shows the bright spots between the dimer row
s.