Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5423931 | Surface Science | 2009 | 9 Pages |
Abstract
We have measured W 4f7/2 core-level photoemission spectra from W(1 1 0) in the presence of Pd overlayers for coverages up to â¼1 pseudomorphic monolayer (ML). At coverages close to 0.05 ML a striking change in the W core-level spectrum is observed, which we interpret as indicating a long-range lateral effect of 2D Pd islands upon the W electronic structure in both the first and second W layers. As the coverage increases the long-range effect weakens and finally vanishes near 0.85 ML. Above this coverage the W spectra are typical for a W-based bimetallic interface, with the first-layer W atoms exhibiting a small interfacial core-level shift (â95 ± 5 meV) compared to the bulk atoms.
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
D.M. Riffe, N.D. Shinn, B. Kim, K.J. Kim, T.-H. Kang,