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High resolution photoemission study of low-temperature oxidation on the Si(001) surface
Yonsei Univ, Atom Scale Surface Sci Res Ctr, Seoul 120749, South Korea Yonsei Univ, Inst Phys & Appl Phys, Seoul 120749, South Korea Linkoping Univ, Dept Phys & Measurement Technol, S-58183 Linkoping, Sweden.
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Surface and Semiconductor Physics .
2000 (English)In: Japanese Journal of Applied Physics, ISSN 0021-4922, E-ISSN 1347-4065, Vol. 39, no 7B, 4460-4463 p.Article in journal (Refereed) Published
Abstract [en]

High-resolution photoemission is applied to the oxygen adsorption on the Si(001) surface at 120 K and the subsequent evolution of the adsorbates upon annealing. Si 2p components due to the Si2+ and Si3+ species are observed from the very early stage of adsorption at similar to 120 K, which grow linearly with the oxygen coverage. This indicates an active agglomeration of oxygen adsorbates even for the submonolayer adsorption at low temperature. Annealing above 500 K enhances the agglomeration by mostly converting the Si1+ species into Si3+ and then into Si4+. In addition, the annealing changes the Si 2p binding energies for the Si2+ and Si3+ species by 0.14 and 0.23 eV, respectively. These shifts are attributed to the structural relaxation (strain relief) of the metastable oxygen-adsorbate complex formed at low temperature.

Place, publisher, year, edition, pages
2000. Vol. 39, no 7B, 4460-4463 p.
Keyword [en]
photoemission, oxidation, silicon surfaces, suboxides, core-level shifts, adsorbates
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-49626OAI: oai:DiVA.org:liu-49626DiVA: diva2:270522
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-12

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Uhrberg, Roger

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