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We investigate the structural and electronic properties of the Si(111) surface covered by 1/3 monolayer Sn (1-x) Si x as a function of x, by means of density functional theory-local density approximation calculations. Starting from the ideal α-phase Sn/Si(111), we perform computational experiments increasing the amount of substitutional Si on the adatom layer, a...
Direct comparison of scanning tunneling microscopy (STM) and high-resolution core level photo-emission experiments provides a rationale for the mechanism of short range ordering in a two-dimensional (2D) binary alloy (1/3 monolayer (ML) Sn (1-x) Si x /Si(111)-(√3x√3)R30 o ). The host pure Sn metal surface (x=0) results partitioned into two classes (2/9 and...
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