Lifetimes of image-potential states on the Pt(111) surface probed by time-resolved two-photon photoemission spectroscopy |
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| Authors: | S Link HA Dürr W Eberhardt |
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| Institution: | Institut für Festk?rperforschung, Forschungszentrum Jülich, 52425 Jülich, Germany, DE
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| Abstract: | We have investigated the population dynamics of image-potential states on the clean Pt(111) surface. The first two image-potential
states have been resolved exhibiting lifetimes of 26±7 fs and 62±7 fs. Those lifetimes are in contrast to the (111) surfaces
of Ag and Cu, where the n=2 state is degenerate with bulk states leading to lifetimes shorter than 20 fs.
Received: 30 March 2000 / Accepted: 2 September 2000 / Published online: 12 October 2000 |
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| Keywords: | PACS: 78 47 +p 73 20 -r 73 20 At 79 60 -i 79 60 Bm |
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