title: Growth of silicene layers on Ag(111): unexpected effect of the substrate temperature.
abstract: The deposition of one silicon monolayer on the silver (111) substrate in the temperature range 150-300 °C gives rise to a mix of (4 × 4), (2√3 × 2√3)R30° and (√13 × √13)R13.9° superstructures which strongly depend on the substrate temperature. We deduced from a detailed analysis of the LEED patterns and the STM images that all these superstructures are given by a quasi-identical silicon single layer with a honeycomb structure (i.e. a silicene-like layer) with different rotations relative to the silver substrate. The morphologies of the STM images are explained from the position of the silicon atoms relative to the silver atoms. A complete analysis of all possible rotations of the silicene layer predicts also a (√7 × √7)R19.1° superstructure which has not been observed so far.
authors.affiliation: CNRS, UMR7325, F-13288 Marseille, France. haik@cinam.univ-mrs.fr
authors.forename: H
authors.initials: H
authors.lastname: Jamgotchian
authors.forename: Y
authors.initials: Y
authors.lastname: Colignon
authors.forename: N
authors.initials: N
authors.lastname: Hamzaoui
authors.forename: B
authors.initials: B
authors.lastname: Ealet
authors.forename: J Y
authors.initials: JY
authors.lastname: Hoarau
authors.forename: B
authors.initials: B
authors.lastname: Aufray
authors.forename: J P
authors.initials: JP
authors.lastname: Bibérian
mesh_terms: D006108:Graphite / Q000737:chemistry; D007554:Isotopes / Q000737:chemistry*; D016252:Microscopy, Scanning Tunneling / Q000379:methods; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods; D012825:Silicon / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013696:Temperature
chemical_list: D007554:Isotopes; D012834:Silver; D006108:Graphite; D012825:Silicon