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Using scanning tunneling microscopy observations and first-principles total-energy calculations, surface dynamics of Ge adatoms on Si(111)“5×5”-Cu reconstructed surface has been studied. The Si(111)“5×5”-Cu reconstruction has been proved to be a quasi-periodic discommensurate Cu 2 Si monolayer, which atomic structure is formed via Cu adsorbing in the H 3 sites (Cu(H 3 )-atoms)...
Using scanning tunneling microscopy, phase formation and temperature-driven phase transitions in Tl/Ge(100) system have been studied. Evolution of Tl overlayer structure has been considered for three temperature ranges, including around room temperature (RT), high-temperature (HT) (350–450K) and low-temperature (LT) (20–100K) ranges. Upon RT growth, a 2×1-Tl phase develops in submonolayer range and...
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