Publication
Physical Review Letters
Paper

Local state density and long-range screening of adsorbed oxygen atoms on the GaAs(110) surface

View publication

Abstract

We report scanning tunneling microscope images of isolated oxygen atoms adsorbed on the GaAs(110) surface. The images display a dramatic voltage dependence, which arises from the energy dependence of the local state density, and provides a signature of an adsorbed electronegative atoms. At low oxygen coverages, a long-range screening of the adsorbed atoms is observed in the surrounding bare surface region, with a characteristic screening length scale of <>50 Ai<>.. AE © 1987 The American Physical Society.

Date

Publication

Physical Review Letters

Authors

Share