Tamm surface resonances in very low energy electron scattering from clean metal surfaces

Details Tamm surface resonances in very low energy electron scattering from clean metal surfaces Tamm surface resonances in very low energy electron scattering from clean metal surfaces

2005-07-12

arxiv.org/abs/cond-mat/0507266v1

Physics

Condensed Matter

Other Condensed Matter

revtex, 4 pages, 3 figures

Scientific paper

Very low-energy features which occur in electron reflectivities from clean fcc metal (111) surfaces have been subject to a number of interpretations. Here we analyse the feature near 19.8 eV on Cu(111) at normal incidence and find that it is due to resonant scattering at the rise of the muffin-tin average interstitial potential between atomic layers on approach to the surface from the bulk. This new mechanism corresponds to a Tamm-type surface resonance which is very different in formation to the usual Shockley and Rydberg resonances and explains all features in a systematic way.

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