Abstract
The surface of PbSe(111) grown on a cleavage (111) surface of BaF 2 by vacuum evaporation is studied using high-resolution Rutherford backscattering spectroscopy. The PbSe(111) surface shows a 3 × 3 RHEED pattern. It is found that the PbSe(111) surface is terminated by Pb atoms and the atomic density of the topmost Pb layer is about 40% of that of the bulk (111) plane.
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