Mechanism of formation of a 2D binary alloy

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dc.creatorOttaviano, L.
dc.creatorProfeta, G.
dc.creatorPetaccia, L.
dc.creatorNacci, C.
dc.creatorSantucci, S.
dc.creatorPesci, A.
dc.creatorPedio, M.
dc.date2001-03-27
dc.date.accessioned2026-07-25T14:20:27Z
dc.descriptionDirect comparison of scanning tunneling microscopy and high resolution core level photo-emission experiments provides a rationale for the mechanism of formation of a two dimensional (2D) binary alloy (1/3 mono-layer (ML) Sn(1- x)Six/Si(111)-\sqrt3X\sqrt3R30). In contrast with recent theoretical predictions, the pure metal surface (x=0) results partitioned into two classes (2/9 ML and 1/9 ML) of ad-atoms occupying non-equivalent T4 sites. During the formation of the alloy, Si ad-atoms preferably occupy the majority type adsorption site. This peculiar substitution mechanism leads to a mutual arrangement of ad-atoms which is not random even at room temperature, but shows the typical short range order universally observed in 2D and quasi 2D binary alloys
dc.descriptionpdf only- 5 pages 3 figures. submitted to Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/cond-mat/0103568
dc.identifierhttp://arxiv.org/abs/cond-mat/0103568
dc.identifier.urihttps://dspace.dare.co.zw/handle/123456789/24872
dc.subjectMaterials Science
dc.titleMechanism of formation of a 2D binary alloy
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