Silicene structures on silver surfaces

    Authors

    H. Enriquez; S. Vizzini; A. Kara; B. Lalmi;H. Oughaddou

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    J. Phys.-Condes. Matter

    Keywords

    TOTAL-ENERGY CALCULATIONS; AUGMENTED-WAVE METHOD; DOUBLE-BOND; BASIS-SET; NANOWIRES; NANOTUBES; GROWTH; METALS; Physics, Condensed Matter

    Abstract

    In this paper we report on several structures of silicene, the analog of graphene for silicon, on the silver surfaces Ag(100), Ag(110) and Ag(111). Deposition of Si produces honeycomb structures on these surfaces. In particular, we present an extensive theoretical study of silicene on Ag(111) for which several recent experimental studies have been published. Different silicene structures were obtained only by varying the silicon coverage and/or its atomic arrangement. All the structures studied show that silicene is buckled, with a Si-Si nearest neighbor distance varying between 2.28 and 2.5 angstrom. Due to the buckling in the silicene sheet, the apparent (lateral) Si-Si distance can be as low as 1.89 angstrom. We also found that for a given coverage and symmetry, one may observe different scanning tunneling microscopy images corresponding to structures that differ by only a translation.

    Journal Title

    Journal of Physics-Condensed Matter

    Volume

    24

    Issue/Number

    31

    Publication Date

    1-1-2013

    Document Type

    Article

    Language

    English

    First Page

    7

    WOS Identifier

    WOS:000306686800016

    ISSN

    0953-8984

    Share

    COinS