Silicene vs. ordered 2D silicide: the atomic and electronic structure of the Si-$(\sqrt{19}\times \sqrt{19})R23.4^{\circ }$/Pt(111) surface reconstruction

Abstract

We discuss the possibility of a 2D ordered structure formed upon deposition of Si on metal surfaces. We investigate the atomic and electronic structure of the Si-$(\sqrt{19}\times \sqrt{19})R23.4^{\circ }$/Pt(111) surface reconstruction by means of a set of experimental surface-science techniques supported by theoretical calculations. The theory achieves a very good agreement with the experimental results and corroborate beyond any doubt that this phase is a surface alloy consisting of Si${}_3$Pt tetramers that resembles a twisted Kagome lattice. These findings render unlikely any formation of silicene or germanene on Pt(111) and other transition metal surfaces.

5 pages, 4 figures

References in corpus (1)

• Electric Field Effect in Atomically Thin Carbon Films

Cited by in corpus (7)

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• Current developments in silicene and germanene
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• Identifying the Alloy Structures of Germanene Grown on Al(111) Surface
• Moiré-modulated band gap and van Hove singularities in twisted bilayer germanene
• One-dimensional Si chains embedded in Pt(111)and protected by a hexagonal boron-nitride monolayer