Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 7: Spin-Orbit Interaction at Surfaces I
O 7.3: Vortrag
Montag, 22. März 2010, 11:45–12:00, H38
Spin-orbit and exchange interaction of the surface state on Au/Ni(111) — •Andreas Nuber1, Frank Forster1, Hendrik Bentmann1, Jürgen Braun2, and Friedrich Reinert1,3 — 1Experimentelle Physik VII, Universität Würzburg, Germany — 2Dep. Chemie und Biochemie, LMU München, Germany — 3Forschungszentrum Karlsruhe, Gemeinschaftslabor für Nanoanalytik, Germany
The surface state of Au(111) is a standard model of spin-orbit Rashba-type splitting, visible in ARUPS as two parabolas shifted in k||-direction. On Ni(111), the surface state is split in energy due to exchange interaction. Both interactions are expected to be present on the surface of thin Au films grown on Ni(111). We used high resolution ARUPS to investigate the system Au/Ni(111) for different Au layer thicknesses and compared our experimental data with photoemission calculations based on LSDA and DMFT. Due to the integrating properties of photoemission we could not resolve a combination of spin-orbit and exchange splitting on unmagnetized samples. But magnetizing the Ni(111) substrate in-plane can change this in principle.