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Formation of a (2×1) local structure is found at submonolayer growth of Tl on the Si(111)-(7×7) surface by means of scanning tunneling microscopy (STM). At low coverages, the (7×7) grid remains and the (2×1) structure is formed inside of the half-unit cells of the (7×7). The (2×1) coexists with other structures, such as of “magic” clusters observed in the case of all other group III metals. Based...
We have examined atomistic processes of hydrogen desorption from the H/Si(001) surface by scanning tunneling microscopy (STM). At a low hydrogen dose, Si atoms are etched from the suface and the patched pattern of 2 1 and 1 2, where each step edge penetrates into neighboring steps, is observed. On the other hand, a quasi-stable c(4 4) surface reconstruction is observed for high doses of hydrogen...
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