Electronic structure of Cu3Au from the Cu viewpoint
1990; Elsevier BV; Volume: 75; Issue: 11 Linguagem: Inglês
10.1016/0038-1098(90)90399-v
ISSN1879-2766
AutoresMichael Kuhn, Tsun‐Kong Sham, J.M. Chen, K. H. Tan,
Tópico(s)Advanced Materials Characterization Techniques
ResumoCu K edge XANES and resonant photoemission spectra of pure Cu, ordered Cu3Au and disordered Cu3Au have been analyzed. XANES results clearly show that there is an increase of occupied density of d states at the Cu site upon alloy formation. This is consistent with data reported at the Au site and a charge compensation model previously proposed. Photoemission results show for the first time the “Cu” d band of the alloy narrowing and shifting towards the fermi level indicating d-d repulsion. Resonant photoemission satellites were found to be insensitive to electronic changes at the Cu site, confirming the atomic nature of the process.
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