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 Å. .AE
- Received 2 February 1987
DOI:https://doi.org/10.1103/PhysRevLett.58.1668
©1987 American Physical Society
