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Structural evolution of Ga thin films grown on the Si(111)-3×3-Ga template have been investigated with a low-temperature scanning tunneling microscopy (STM). The first Ga layer exhibits a stripe structure along the base vectors of Si(111) lattices. Individual Ga dimers have been directly visualized from the high-resolution STM images of the first Ga layer. The second Ga layer reveals a pseudo 1×1...
We studied the self-organization of Cd clusters on Si(111)-7×7 surface with an ultrahigh vacuum scanning tunneling microcopy (STM). Highly-ordered arrays of Cd nanoclusters have been fabricated by elevating the substrate temperature. The Cd clusters occupy equally the faulted and unfaulted half-unit cells of Si(111)-7×7 without obvious preference to either of them, forming Cd cluster pairs or hexamers...
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