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In this paper we use XPS to study the interaction of Ce overlayers with the semiconductor GaSb(111) surface and Ce-promoted oxidation of the substrate. The results show that when cerium deposits on GaSb(111), it forms weak bonds of Ce-Ga and Ce-Sb with the substrate and makes Ga atoms diffuse out. A Ce-Ga intermetallic phase is formed on the surface. When the exposure of O 2 reaches 50 L,...
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