Core-Level Spectroscopy of the Pd/W(110) Interface: Evidence of Long-Range Pd-Island—WInteractions at Submonolayer Coverages

Authors

D. Mark Riffe, Utah State UniversityFollow
N. D. Shinn
B. Kim
K. J. Kim
T. H. Kang

Document Type

Article

Journal/Book Title/Conference

Surface Science

Volume

603

Issue

7

Publication Date

4-1-2009

First Page

1070

Last Page

1078

Abstract

We have measured W 4f_7/2 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.

Recommended Citation

"Core-Level Spectroscopy of the Pd/W(110) Interface: Evidence of Long-Range Pd-Island—W Interactions at Submonolayer Coverages," D. M. Riffe, N. D. Shinn, B. Kim, K. J. Kim, and T.-H. Kang, Surface Science 603, 1070 (2009) (doi:10.1016/j.susc.2009.02.026).

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