Abstract
Surface photoemission spectra of metals have been discussed theoretically since Sommerfeld developed his model of a metal in 1928, the so-called jellium model. The subject is still highly controversial among theorists. A spectroscopic technique — surface photoemission spectroscopy on jellium (SPJ) — which fully exploits the properties of synchrotron radiation, made it possible to separate unambiguously the photoyield caused by the surface photoelectric effect of metals optically excited byp-polarized light from other contributions to the yield. The technique was applied to aluminum and surface photoyield spectra were obtained for the first time. The extreme surface sensitivity, which is implicit in the transition matrix element of the surface photoexcitation process of metals, was experimentally confirmed. The new technique, therefore, provides one of the most powerfull tools for the investigation of the charge distribution and the dielectric response at metal surfaces.
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References
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Petersen, H. Observation of the surface photoelectric effect of metals: Surface photoyield spectra of aluminum. Z Physik B 31, 171–176 (1978). https://doi.org/10.1007/BF01333888
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DOI: https://doi.org/10.1007/BF01333888