All Physics Faculty Publications

Document Type

Article

Journal/Book Title/Conference

Surface Science

Volume

603

Issue

7

Publication Date

4-1-2009

First Page

1070

Last Page

1078

DOI

10.1016/j.susc.2009.02.026

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 ∼1 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 (−95 ± 5 meV) compared to the bulk atoms.

Comments

Published by Elsevier in Surface Science. Publisher PDF is available through link above. Author post print available for download through link above.

http://www.sciencedirect.com/science/article/pii/S0039602809001897

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