Title
Adsorbate induced changes in surface stress and phonon dispersion curves of chemisorbed systems
Abbreviated Journal Title
J. Phys.-Condes. Matter
Keywords
SCANNING-TUNNELING-MICROSCOPY; PHOTOELECTRON DIFFRACTION; INDUCED; RECONSTRUCTION; NI(100) SURFACE; CARBON; OXYGEN; LEED; CU(100)C(2X2)-N; SCATTERING; FORMALISM; Physics, Condensed Matter
Abstract
We present a summary of theoretical results documenting changes in surface stress and surface phonon frequencies for selected light gas adsorbates on Ni(001) and Cu(001) which, when compared with experimental data, provide critical information on surface geometry and electronic structure. Our calculations of the surface electronic structure are based on density functional theory, using the pseudopotential method, while the evaluation of surface dynamics relies on the density functional perturbation theory. A c(2 x 2) overlayer of C on Ni(001) and of N on Cu(001), causes a large change in the surface stress (approximate to 5 N m(-1)) turning it from tensile to compressive in both cases. We find that while adsorbate induced surface stress change depends on the height at which the adsorbate sits on the surface, it is not a direct measure of the propensity of the substrate to reconstruct. We also consider examples of changes in surface electronic structure, and surface force fields and hence the characteristics of surface phonon dispersion curves, brought about by chemisorption, and compare them with experimental data where available.
Journal Title
Journal of Physics-Condensed Matter
Volume
20
Issue/Number
22
Publication Date
1-1-2008
Document Type
Article; Proceedings Paper
Language
English
First Page
8
WOS Identifier
ISSN
0953-8984
Recommended Citation
"Adsorbate induced changes in surface stress and phonon dispersion curves of chemisorbed systems" (2008). Faculty Bibliography 2000s. 456.
https://stars.library.ucf.edu/facultybib2000/456
Comments
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