Angle-resolved photoelectron spectroscopy studies of surface alloying in Au/Cu(001)

1 May 1989

journal article
Published by American Vacuum Society in Journal of Vacuum Science & Technology A

Vol. 7 (3) , 2475-2480
https://doi.org/10.1116/1.575880

Abstract

We have performed an extensive angle‐resolved photoelectron spectroscopy investigation of the surface‐alloying phenomena in the system Au/Cu(001), utilizing resonance lamp emission and synchrotron radiation. The alloy surface state, near M̄ in the Cu(001) surface Brillouin zone, and the Au 4 f core levels exhibit significant binding‐energy shifts as a function of adsorbate coverage and substrate temperature. These and other changes are indicative of the formation and subsequent elimination of the surface‐alloy structure. Our new results will allow the consolidation of a vast body of previous results, including low‐energy electron diffraction, Auger electron spectroscopy, and photoemission measurements of Au/Cu(001), bulk Cu_1−x Au_x alloys, Cu₃ Au(001), and Au(111).

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