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

Journal Article · Thu Jan 01 00:00:00 EST 2009 · Surface Science

DOI:https://doi.org/10.1016/j.susc.2009.02.026· OSTI ID:980085

Riffe, D; Shinn, N; Kim, B; Kim, K; Kang, T

We have measured W 4f{sub 7/2} core-level photoemission spectra from W(1 1 0) in the presence of Pd overlayers for coverages up to {approx}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.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: DE-AC02-98CH10886
• OSTI ID: 980085
• Report Number(s): BNL-93003-2010-JA; SUSCAS; TRN: US201015%%1470
• Journal Information: Surface Science, Vol. 603, Issue 7; ISSN 0039-6028
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ATOMS
ELECTRONIC STRUCTURE
INTERACTIONS
ISLANDS
LAYERS
PHOTOEMISSION
SPECTRA
SPECTROSCOPY
national synchrotron light source