Observation of a low-binding-energy peak in the 2p core-level photoemission from oxidized Al(111)

High-resolution photoemission studies of oxidation of the Al(111) surface have been performed. The appearance of a component at lower binding energy than the metallic bulk Al emission in the Al 2p spectrum at oxygen exposures above ∼50 langmuir (1 L = 10-6 Torr s) is argued to be due to Al atoms which do not bond directly to oxygen atoms at the oxide-metal interface. Low-energy electron diffraction initially shows a 1×1 structure, which subsequently fades away at higher oxygen exposures, 400 L.

Raaen, S.Norwegian University of Science and Technology (author)
Borg, A.Foundation for Scientific and Industrial Research (SINTEF) (author)
Andersen, J. N.Lund University,Lunds universitet,MAX IV-laboratoriet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,MAX IV Laboratory,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)slju-jan (author)
Lundgren, E.Lund University,Lunds universitet,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)slju-elu (author)
Nyholm, R.Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory(Swepub:lu)maxl-rny (author)
Norwegian University of Science and TechnologyFoundation for Scientific and Industrial Research (SINTEF) (creator_code:org_t)

By the author/editor: Berg, C.; Raaen, S.; Borg, A.; Andersen, J. N.; Lundgren, E.; Nyholm, R.

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