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A theory is proposed for the full temperature and band occupation dependence of Auger electron (AE) and appearance potential (AP) spectra of a model band ferromagnet. In particular, it is demonstrated how a magnetic phase transition is manifested in the AE and AP spectra. An approximate theory for PES and IPE one-particle spectroscopy is presented. The conditions relating to the coupling strength U/W, band occupation n and temperature T under which magnetic phase transitions occur for a given BDOS (Bloch density of states) are discussed. An approximate procedure for representing the two-quasiparticle density of states in terms of the one-particle function is given and typical results discussed.

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Authors: NOLTING W, Universität Osnabrück, Fachbereich Physik (DE);GEIPEL G, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);ERTL K, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE)
Bibliographic Reference: Article: Physical Review B, Vol. 44 (1991) No. 22, pp. 12197-12215
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