Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5424482 | Surface Science | 2008 | 8 Pages |
Abstract
We have measured W 4f7/2 core-level photoemission spectra from W(1 1 0) in the presence of Ni overlayers, from â¼0.2 to â¼3 monolayers. Interfacial core-level shifts associated with first-layer Ni phases have been identified: â230 ± 15 meV for the 1 Ã 1 pseudomorphic phase and â70 ± 7 meV for the 7 Ã 1 close-packed commensurate phase. At higher Ni coverages the interfacial core-level shift is â100 ± 10 meV. These shifts are analyzed using the partial-shift model of Nilsson et al. [Phys. Rev. B 38 (1988) 10357]; the analysis indicates that the difference in binding energies between the 1 Ã 1 and 7 Ã 1 phases has a large contribution from structural differences between the two phases.
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
D.M. Riffe, R.T. Franckowiak, N.D. Shinn, B. Kim, K.J. Kim, T.-H. Kang,