Valence-band photoemission and Auger-line-shape study of Au[sub [ital x]]Pd[sub 1[minus][ital x]]
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- Institute fur Technische Elektrochemie, Technische Universitat Wien, Getreidemarkt 9/158, A-1060 Wien (Austria)
We report an experimental study of the electronic structure of the alloy system Au[sub [ital x]]Pd[sub 1[minus][ital x]]. Valence-band photoemission spectra were recorded using synchrotron radiation, exploiting the different photoionization cross sections of the Au and Pd [ital d] bands to identify the spectral features. We find that recent electronic-structure calculations using the Korringa-Kohn-Rostoker method with the coherent-potential approximation (KKR-CPA) give good agreement with our results, whereas earlier calculations using other methods show serious discrepancies. In addition we measured the Au [ital N][sub 6,7][ital VV] and Pd [ital M][sub 4,5][ital VV] Auger line shapes. We find that one-electron calculations using the KKR-CPA results give reasonable qualitative agreement for the Au line shapes across the alloy series. Similar agreement is found for the Pd Auger line shapes at high Pd concentrations, but this breaks down for low Pd concentrations. We suggest that this disagreement results from a neglect of many-body interactions rather than a problem with the KKR-CPA calculations.
- OSTI ID:
- 7233665
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 49:23; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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