Matthias Muntwiler and X-Y Zhu 2008 New J. Phys. 10 113018 doi:10.1088/1367-2630/10/11/113018
Image-potential states on the metallic (111) surface of bismuth
Matthias Muntwiler1 and X-Y Zhu
Show affiliationsAn 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.
- PACS
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73.20.At Surface states, band structure, electron density of states
- Subjects
- Dates
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Issue 11 (November 2008)
Received 8 August 2008
Published 14 November 2008
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Image-potential states on the metallic (111) surface of bismuth
Matthias Muntwiler and X-Y Zhu 2008 New J. Phys. 10 113018
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