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Complete breakdown of the one-electron picture of auger spectra of solids
Authors:M Ohno  G Wendin
Institution:Institute of Theoretical Physics, Chalmers University of Technology, S-412 96 Göteborg, Sweden
Abstract:The very broad M45?N23N45 (3d-1 → 4p-14d-1) Auger spectra for metals in the range Pd to Te arise from complete breakdown of the one-electron picture of the final state double vacancy due to 4p-14d-1 ? 4d-3?f giant Coster-Kronig fluctuation and decay processes. This is an example of atomic-like effects giving rise to level shifts and broadening which are large in comparison with typical widths of d-bands in solids. The 4p-14d-1 two-hole spectral function can be approximated by a 4p-1 single-hole spectral function perturbed by a static, sharp 4d-1 hole. The resulting Auger line-shapes are different from single-hole 4p-1 line-shapes from XPS and XES. Analogous effects also occur for double vacancies involving one or two 4s-holes.
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