Abstract
Our previous theory, which took exact account of three-body correlation in a single band model, is extended to include the effects of orbital degeneracy in 3d-bands. Using this theory, many-body effects on the photoemission and inverse photoemission spectra in ferromagnetic nickel are studied with a simple model. Reductions of exchange splitting and of the band width are obtained in good agreement with experiments. A strong satellite peak appears for the unoccupied states as well as the occupied states. The strong ferromagnetism of nickel, where majority spin bands are completely occupied, turns unstable with increasing hole number.
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© 1988 Springer-Verlag Berlin Heidelberg
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Igarashi, J. (1988). Many-Body Effects on Photoemission and Inverse Photoemission Spectra in Ferromagnetic Nickel. In: Kanamori, J., Kotani, A. (eds) Core-Level Spectroscopy in Condensed Systems. Springer Series in Solid-State Sciences, vol 81. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-83437-0_14
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DOI: https://doi.org/10.1007/978-3-642-83437-0_14
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