ANGLE-RESOLVED PHOTOEMISSION FROM AU DEPOSITED ON AG(111) - EVIDENCE FOR SURFACE ALLOY FORMATION

Autor(en): LIPPHARDT, U
ENGELHARD, H
WESTHOF, J
GOLDMANN, A
WITZEL, S
Stichwörter: AES INVESTIGATIONS; AG; BAND-STRUCTURE; Chemistry; Chemistry, Physical; CORE-LEVEL SHIFTS; ELECTRONIC-STRUCTURE; FILMS; GOLD; GROWTH; LAMBDA-LINE; Physics; Physics, Condensed Matter; STATES
Erscheinungsdatum: 1993
Herausgeber: ELSEVIER SCIENCE BV
Journal: SURFACE SCIENCE
Volumen: 294
Ausgabe: 1-2
Startseite: 84
Seitenende: 92
Zusammenfassung: 
We have performed an extensive study of angle-resolved normal photoemission from Au deposited on Ag(111) at temperatures T less-than-or-equal-to 330 K. In contrast to other authors we do not observe a layer-by-layer growth of Au(111) with an abrupt interface to the substrate. Our results present clear evidence that in the first deposition steps on ordered alloy interface develops, with a silver-rich outermost layer and an estimated thickness of at least 4-5 monolayers, until after more than 5 nominal Au-monolayers bulk-like gold starts to grow. Besides information on the particular Au/Ag(111) system our results demonstrate the capabilities of angle-resolved photoemission to explore extended interfaces.
ISSN: 00396028
DOI: 10.1016/0039-6028(93)90161-C

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