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M. Wagner, P. Lackner, S. Seiler, S. Gerhold, J. Osiecki, K. Schulte, L. Boatner, M. Schmid, B. Meyer, U. Diebold:
"Well-Ordered In Adatoms at the In₂O_{3}(111) Surface Created by Fe Deposition";
Physical Review Letters, 117 (2016), 2061011 - 20610118.

Metal deposition on oxide surfaces usually results in adatoms, clusters, or islands of the deposited
material, where defects in the surface often act as nucleation centers. Here an alternate configuration is
reported. After the vapor deposition of Fe on the In2O3ð111Þ surface at room temperature, ordered adatoms
are observed with scanning tunneling microscopy. These are identical to the In adatoms that form when the
sample is reduced by heating in ultrahigh vacuum. Density functional theory calculations confirm that
Fe interchanges with In in the topmost layer, pushing the excess In atoms to the surface where they arrange
as a well-ordered adatom array.