Surface modifications induced by adsorbates at low coverage: A scanning tunneling microscopy study of the Ni/Si(111)√19surface
- 15 June 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 58 (24), 2575-2578
- https://doi.org/10.1103/physrevlett.58.2575
Abstract
Scanning tunneling microscope images of the √19 reconstruction of Ni/Si(111) are shown to rule out existing models for this surface. A new model, based on Si adatom stabilization and sixfold-coordinated Ni sites, is shown to give excellent agreement with the images and to explain the origin of the unit-cell geometry and some surface defects. The results demonstrate that nickel atoms, through Si adatom bonding, the strong effects on the bonding of first-, second-, and third-nearest-neighbor Si surface atoms. This realization provides important insight into the mechanism whereby very small quantities of nickel on the Si(111) surface completely alter the surface structure.Keywords
This publication has 16 references indexed in Scilit:
- Variable stoichiometry surface reconstructions: New models for GaAs(1¯1¯1¯) (2×2) and (√1¯9¯×√1¯9¯)Physical Review Letters, 1986
- Structure analysis of Si(111)-7 × 7 reconstructed surface by transmission electron diffractionSurface Science, 1985
- LEED investigations on the interaction of Pd and Ni with different Si(111) surfacesSurface Science, 1984
- Structure and Nucleation Mechanism of Nickel Silicide on Si(111) Derived from Surface Extended-X-Ray-Absorption Fine StructurePhysical Review Letters, 1983
- Formation of Ultrathin Single-Crystal Silicide Films on Si: Surface and Interfacial Stabilization of Si-NiEpitaxial StructuresPhysical Review Letters, 1983
- New model for the reconstructed Si(111)7 × 7 and Si(111)√19 × √19−R(±23°5) surfacesSurface Science, 1981
- New Models for Metal-Induced Reconstructions on Si(111)Physical Review Letters, 1981
- Leed study of a nickel induced surface structure on silicon (111)Surface Science, 1967
- Possible structures for clean, annealed surfaces of germanium and siliconSurface Science, 1964
- Structure and Adsorption Characteristics of Clean Surfaces of Germanium and SiliconThe Journal of Chemical Physics, 1959