| AVS 55th International Symposium & Exhibition | |
| Surface Science | Wednesday Sessions |
| Session SS2+NC-WeM |
| Session: | Functional Metal Oxides and Quantum Metal Structures |
| Presenter: | M.C. Patterson, Louisiana State University |
| Authors: | M.C. Patterson, Louisiana State University O. Kizilkaya, Louisiana State University R.L. Kurtz, Louisiana State University P.T. Sprunger, Louisiana State University |
| Correspondent: | Click to Email |
We present ultraviolet photoemission and STM studies of Ag and Au clusters deposited on both clean and oxidized FeAl(110). Preliminary DFT calculations indicate that deposition of Ag or Au results in the formation of bilayer islands with Ag(110) or Au(110)-like structure, due to the almost perfect match between the adsorbate and substrate lattice constants. This is concordant with studies of Ag growth on the similar intermetallic alloy NiAl(110).1 High coverage levels of either adsorbate do not wet the FeAl surface, which can be seen by the presence of distinctive FeAl(110) valence band, Al 2p core level, and Fe 3p core level features at all levels of coverage. Angle dependent photoemission shows no dispersion in valence band features as a function of emission angle, and confirms that adsorbate, Fe, and Al are all present in the surface region. Additionally, some evidence of Al-Au alloying is observed in the Al 2p core level and Au 5p features in the Au/FeAl(110) system.
1B. Unal, F. Qin, Y. Han, D. Liu, D. Jing, A. R. Layson, C. J. Jenks, J. W. Evans, and P. A. Thiel, Phys. Rev. B. 76, 195410 (2007).