Ag adatoms on Si(111)5x2-Au surface

Using scanning tunneling microscopy together with the first-principles density functional theory calculations we study structural properties of the Si(111)5x2-Au surface covered by Ag adatoms. The STM topography data show that a submonolayer coverage of Ag does not lead to a well-ordered adatom chai...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Stepniak, A, Krawiec, M, Jalochowski, M
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 08.10.2014
Subjects
Adatoms
Density functional theory
First principles
Gold
Periodic variations
Silicon
Silver
Unit cell
Online AccessGet full text

Cover

More Information
Summary:Using scanning tunneling microscopy together with the first-principles density functional theory calculations we study structural properties of the Si(111)5x2-Au surface covered by Ag adatoms. The STM topography data show that a submonolayer coverage of Ag does not lead to a well-ordered adatom chain structure with a periodicity 5x4, as it was observed for Si, Pb and In adatoms. Instead of that, we observe Ag adatoms located in different nonequivalent positions within the unit cell, which confirms the electronic nature of stabilization of the Si(111)5x2-Au surface. Moreover, the DFT calculations give five different structural models of the Si(111)5x2-Au/Ag surface. All the models are almost degenerate in energy, which further supports the above scenario.
ISSN:2331-8422