Theory Department
Max Planck Institute of Microstructure Physics
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Feder, R. and Gollisch, H., Scheunemann, T., Berakdar, J., Henk, J.

Theory of electron- and photon-induced two-electron emission from surfaces
Many Particle Spectroscopy of Atoms, Molecules, Clusters, and Surfacespp 435-449 (Eds.) Berakdar, J. and Kirschner, J.,Kluwer Academic/Plenum Publishers, New York, USA 2001
A short review is given of recent theoretical developments in (e,2e) and (γ,2e) spectroscopy from surfaces in reflection geometry. We first outline a general formal framework and currently viable approximations. Subsequently, a selectrion of numerical results demonstrates the quantitative agreement with experimental data, the extreme surface sensitivity of (e,2e), the imaging of a surface state dispersion, the influence of the Coulomb pair correlation between the two detected electrons, and the usefulness of spin-polarized primary electrons for the study of spin-dependent collision dynamics and of magnetic surface properties.

TH-2001-16