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On the Auger-photoelectron coincidence spectroscopy spectra of Cu(100), Cu metal and CuOx/Cu surface
Institution:1. Institute of Materials Science, University of Silesia, 75 Pu?ku Piechoty 1A, PL-41-500 Chorzów, Poland;2. Département de chimie, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
Abstract:The M3–VV Auger-photoelectron coincidence spectroscopy (APECS) spectrum of Cu(100) and the L3–VV APECS spectra of Cu metal and CuOx/Cu surface are analyzed in detail. The narrowing and energy shift of the photoelectron line in the M3–VV APECS spectrum is well predicted by the present theory. The spectrum shows the presence of the M2–M3(V)–VV(V) decay in which a hole in the 4s band hops away prior to the decay of M3 hole. The analysis of the L3 photoelectron spectra of Cu metal measured in coincidence with the 3F or 1G Auger line raises a question concerning the presence of two different core–hole states upon the L3 level ionization recently proposed by Thurgate and Jiang Surf. Sci. 466 (2000) L807]. The analysis of the L3–VV APECS spectrum of CuOx/Cu shows that the final-state charge–transfer interaction plays an important role in CuO.
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