Berlin 2018 – scientific programme
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O: Fachverband Oberflächenphysik
O 90: Electronic structure of surfaces: Spectroscopy, surface states IV
O 90.10: Talk
Thursday, March 15, 2018, 12:45–13:00, MA 042
The 3D electronic structure of Os(0001) and Re(0001) probed by angle- and spin-resolved soft x-ray photoemission — •Christian Mende1, Jürgen Braun1, Jan Minár2, Hans-Joachim Elmers3, Gerd Schönhense3, and Hubert Ebert1 — 1Dept. Chemie, LMU München, Germany — 2NTRC, University of West Bohemia, Plzen, Czech Republic — 3Institut für Physik, JGU Mainz, Germany
In this contribution we discuss the impact of the spin-orbit coupling on the 3D electronic structure of hcp Os(0001) and Re(0001) as reflected by angle- and spin-resolved soft x-ray photoemission. The spectroscopical analysis has been performed within the framework of the fully relativistic version of the one-step model of photoemission in its spin-density matrix formulation [1]. For this purpose the underlying electronic structure is calculated self-consistently for a semi-infinite half-space configuration using the so called tight-binding (TB) mode of the KKR (Korringa-Kohn-Rostoker) method [2]. To guarantee for a quantitative description of the surface-sensitive spectral features special attention is paid to the image-potential behavior of the surface barrier, which is included as an additional layer in the photoemission formalism. The results that give clear evidence for a pronounced impact of spin-orbit coupling will be discussed in detail in comparison with recent experimental work.
[1] J. Braun et al., New Journal of Physics 16, 015005 (2014).
[2] H. Ebert et al., The Munich SPR-KKR package, version 7.7.0, http://olymp.cup.uni-muenchen.de/ak/ebert/SPRKKR (2017).