The initial oxidation of Rh(100) has been studied using high resolution core level spectroscopy, low energy electron diffraction, surface x-ray diffraction, scanning tunneling microscopy and density functional theory. We report on a new oxygen induced structure displaying a c(8 × 2) periodicity at an oxygen pressure above 10-5 mbar and using a sample temperature of 700 K. Our experimental and theoretical data demonstrate that this structure is due to the formation of a thin surface oxide with a hexagonal trilayer O-Rh-O structure.
Corresponding author: J. Gustafson. Reprints also available from M. Schmid (schmid).
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