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- W2052578633 abstract "Abstract Scanning tunneling microscopy (STM) is used to study two types of structures formed on Ge(111): clean c(2 × 8) and the Sn-induced (7 × 7). For the clean annealed Ge(111) surface, we have found for the first time co-existent symmetric and asymmetric c(2 × 8) structures in separate domains with typical sizes of 400 A. Exposure to submonolayer amounts of Sn at high temperatures is found to form both (7 × 7) and (5 × 5) structures with domain sizes of 300 A. Empty-state images of the (7 × 7) reveal strong asymmetry among the adatoms in the dimer-adatom-stacking fault (DAS) model: the inner adatoms tend to form twelve-member rings around the corner holes, suggesting preferential Sn adsorption in these rings. The relationship of these observations to previous structural and spectroscopic studies of these surfaces is discussed." @default.
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- W2052578633 date "1993-07-01" @default.
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- W2052578633 title "Asymmetry of adatoms on Ge(111) observed by scanning tunneling microscopy: the clean c(2 × 8) and Sn-induced (7 × 7) structures" @default.
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- W2052578633 doi "https://doi.org/10.1016/0167-2584(93)90285-q" @default.
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