Abstract
Abstract The dynamics of adsorption and desorption of Sb on atomically clean dimer reconstructed Si(0 0 1) surface is carefully monitored. Superstructure formation of the Sb/Si(0 0 1)-(2 × 1) system is studied by submonolayer Sb adsorption and in situ characterization in ultra-high vacuum by surface sensitive techniques such as low energy electron diffraction (LEED), Auger electron spectroscopy (AES) and electron energy loss spectroscopy (EELS). Sb is adsorbed onto double-domain (DD) (2 × 1)-reconstructed Si(0 0 1) surface at a flux rate of 0.06 ML/min at various substrate temperatures. A complete phase diagram for this Sb/Si(0 0 1)-(2 × 1) system is drawn for the first time by consolidating the results of the adsorption–desorption studies for Sb adsorbed at various substrate temperatures and coverages. The 0.6 ML (8 × 4) surface superstructure shown in the phase diagram was reported earlier by us and the novel 0.25 ML (12 × 2) is reported here for the first time. The results demonstrate the ability of kinetic control in forming several stable novel superstructures, depending on the pathway adopted in the formation of the interface.
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