Image-potential states on the metallic (111) surface of bismuth

Details Image-potential states on the metallic (111) surface of bismuth Image-potential states on the metallic (111) surface of bismuth

Nov 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008njph...10k3018m&link_type=abstract

New Journal of Physics, Volume 10, Issue 11, pp. 113018 (2008).

Physics

2

Scientific paper

An extended series (up to n=6, in quantum beats) of image-potential states (IPS) is observed in time-resolved two-photon photoelectron (TR-2PPE) spectroscopy of the Bi(111) surface. Although mainly located in the vacuum, these states probe various properties of the electronic structure of the surface as reflected in their energetics and dynamics. Based on the observation of IPS a projected gap in the surface normal direction is inferred in the region from 3.57 to 4.27 eV above the Fermi level. Despite this band gap, the lifetimes of the IPS are shorter than on comparable metals, which is an indication of the metallic character of the Bi(111) surface.

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