Journal article
Vibrational modes of the Cu(100)-c(2x2)-Pd surface
The vibrational modes of the surface have been measured using electron-energy loss spectroscopy. The measured mode energies are compared to dynamical models with parameters taken from effective medium theory. Strong Pd-Cu interplanar bonding gives rise to nearly degenerate Pd and Cu vibrations (95 cm(-1)) at the (X) over bar point, despite the large mass difference of the ions.
Upon low-temperature annealing of the surface, overlayer islands of pure Cu coalesce and order. These overlayer islands are characterized by a high-energy vibrational mode near 128 cm(-1) which grows in intensity upon annealing.
Language: | English |
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Year: | 1996 |
Pages: | 63-70 |
ISSN: | 18792758 and 00396028 |
Types: | Journal article |
DOI: | 10.1016/0039-6028(95)01376-8 |