Photoemission intensities from angle-resolved photoelectron spectroscopy with polarized synchrotron radiation were measured and calculated for a magnetization averaged Ni(111) single-crystal surface. Concentrating on the large variations of intensity in dependence on the experimental geometry and parameters, we discuss the exchange-split sp bands crossing EF and identify strong matrix-element effects that are not dependent on selection rules involving parity. Comparison of experimental intensities with ab initio photoemission calculations provides a firm basis for disentangling symmetry from intrinsic effects due to the initial state. The calculated spectra provide a direct connection between ground-state properties (given by the spectral function) and the experimental intensities.
Matrix element effects in angle-resolved valence band photoemission with polarized light from the Ni(111) surface / M. Mulazzi, M. Hochstrasser, M. Corso, I. Vobornik, J. Fujii, J. Osterwalder, J. Henk, G. Rossi. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 74:3(2006), pp. 035118.1-035118.8.
Matrix element effects in angle-resolved valence band photoemission with polarized light from the Ni(111) surface
G. RossiUltimo
2006
Abstract
Photoemission intensities from angle-resolved photoelectron spectroscopy with polarized synchrotron radiation were measured and calculated for a magnetization averaged Ni(111) single-crystal surface. Concentrating on the large variations of intensity in dependence on the experimental geometry and parameters, we discuss the exchange-split sp bands crossing EF and identify strong matrix-element effects that are not dependent on selection rules involving parity. Comparison of experimental intensities with ab initio photoemission calculations provides a firm basis for disentangling symmetry from intrinsic effects due to the initial state. The calculated spectra provide a direct connection between ground-state properties (given by the spectral function) and the experimental intensities.File | Dimensione | Formato | |
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