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The diffusion of Co atoms in the Cu(001) surface has been studied using Scanning Tunneling Microscopy (STM). Like other impurities in the Cu(001) surface, the diffusion of Co is mediated by single surface vacancies. STM images reveal that diffusion of the embedded atoms takes place through multi-atom jumps separated by long time intervals, which is characteristic for this type of diffusion. The jump...
Surface morphology of three kinds of Si(11n) surfaces during Ga deposition has been studied by scanning tunneling microscopy to investigate nano-facet formation processes on high-index silicon surfaces. It has been observed that Si(113) surfaces with vicinal angles of +/-2 o changed into nano-facet structures of (112) and (115) at 1ML Ga deposition as well as a flat Si(113). In contrast, no...
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