Electron-correlation effects in appearance-potential spectra of Ni
M. Potthoff, T. Wegner, W. Nolting, T. Schlathölter, M. Vonbank, K. Ertl, J. Braun, M. Donath
Abstract
Spin-resolved and temperature-dependent appearance-potential spectra of ferromagnetic Nickel are measured and analyzed theoretically. The Lander self-convolution model which relates the line shape to the unoccupied part of the local density of states turns out to be insufficient. Electron correlations and orbitally resolved transition-matrix elements are shown to be essential for a quantitative agreement between experiment and theory.
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