Adsorption sites of Te on Si(001)
| Autor: | P. A. Montano, Michael J. Bedzyk, Paul F. Lyman, H. L. Hutchason, M. E. Keeffe, D. L. Marasco, D. A. Walko |
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| Rok vydání: | 2004 |
| Předmět: |
Auger electron spectroscopy
Chemistry Thermal desorption spectroscopy Analytical chemistry X-ray standing waves Surfaces and Interfaces Condensed Matter Physics Surfaces Coatings and Films Crystallography Adsorption Electron diffraction Ab initio quantum chemistry methods Desorption Monolayer Materials Chemistry |
| Zdroj: | Surface Science. 561:248-260 |
| ISSN: | 0039-6028 |
| DOI: | 10.1016/j.susc.2004.05.071 |
| Popis: | Using multiple surface science techniques, we have investigated the structure of 0.3–1 Te monolayers adsorbed on Si(0 0 1). X-ray standing waves, low-energy electron diffraction, temperature-programmed desorption, and Auger electron spectroscopy show a relatively poorly-ordered surface. The disorder is due to two nearly degenerate Te adsorption sites, which tends to double the periodicity along one direction of the surface and reduces adatom/substrate mismatch by slightly increasing the separation of adjacent Te atoms. High-temperature anneals around 575 °C increase the degree of local and long-range order, while leaving the average local structure unchanged. Our findings are consistent with recent ab initio molecular dynamics simulations but not with experimental studies wherein surfaces were prepared by desorption of CdTe films. |
| Databáze: | OpenAIRE |
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