Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 16: Poster I
MA 16.43: Poster
Dienstag, 12. März 2013, 10:30–13:30, Poster D
Test of band structure calculations for Heusler compounds by spin-resolved photoemission spectroscopy — Michaela Kolbe1, Stanislav Chadov2, Elena Arbelo Jorge1, Gerd Schönhense1, Claudia Felser2, Hans-Joachim Elmers1, Mathias Kläui1, and •Martin Jourdan1 — 1Institut für Physik, Johannes Gutenberg-Universität, Staudingerweg 7, 55128 Mainz — 2Max-Planck-Institut für Chemische Physik fester Stoffe, Dresden
The electronic density of states of epitaxial thin films of the Heusler compound Co2MnGa is probed in situ by spin-resolved ultraviolet photoemission spectroscopy. The experiments reveal several characteristic features in the intensity spectrum and a clear Fermi edge signature. A high spin polarization of 55% at the Fermi edge is followed by a sign change at the binding energy of 0.8 eV. Corresponding calculations of the band structure and the photoemission spectrum were performed employing a spin-polarized relativistic Korringa-Kohn-Rostoker code. Good agreement between the experimental data and calculations was obtained, including dynamical correlation effects [1].
[1] M. Kolbe et al., Phys. Rev. B, 86, 024422 (2012)