Resonant interband scattering of image-potential states |
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| Authors: | W. Berthold J. Güdde P. Feulner U. Höfer |
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| Affiliation: | Fachbereich Physik und Wissenschaftliches Zentrum für Materialwissenschaften, Philipps-Universit?t, 35032 Marburg, Germany, DE
Physik-Department E20, Technische Universit?t München, 85748 Garching, Germany, DE
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| Abstract: | Image-potential states in front of a clean Cu (100) surface were investigated by time- and angle-resolved two-photon photo-emission (2PPE). We observe a previously unknown quasi-elastic relaxation channel, which efficiently couples states with different quantum numbers, n, and parallel momenta, k∥. This process of resonant interband scattering (RIS) is independent of sample temperature and shows a close relationship to the pure dephasing of image-potential states. Received: 1 October 2001 / Revised version: 24 October 2001 / Published online: 23 November 2001 |
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| Keywords: | PACS: 73.20.At 78.47.+p |
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