Unoccupied surface state on Pt(111) revealed by scanning tunneling spectroscopy

J. Wiebe, F. Meier, K. Hashimoto, G. Bihlmayer, S. Blügel, P. Ferriani, S. Heinze, R. Wiesendanger

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49 Citations (Scopus)


We measured the dispersion of an unoccupied surface state on Pt(111) by imaging scattering states at point defects and step edges using scanning tunneling spectroscopy. By comparison to first-principles electronic structure calculations the state is assigned to an sp-derived surface band at the lower edge of the projected bulk band gap. In dI/dV(V) curves, the onset of the surface-state band appears as a rather broad feature. Its shape results from two spin-orbit split branches with nearly linear dispersion, one of them merging into bulk states at higher energies.

Original languageEnglish
Article number193406
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number19
Publication statusPublished - 2005 Nov 15


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