Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 73: Electronic Structure of Surfaces 1
O 73.5: Vortrag
Donnerstag, 8. September 2022, 16:00–16:15, S053
Interplay of exchange and spin-orbit interaction in ultrathin Ni films on W(110) — •Pascal Jona Grenz1, Peter Krüger2, and Markus Donath1 — 1Physikalisches Institut, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany — 2Institut für Festkörpertheorie, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
Ferromagnetic adsorbates on high-Z substrates are prototypical systems for studying the combined influence of spin-orbit and exchange interaction on electronic states [1,2]. The unoccupied electronic states of ultrathin Ni films on W(110) were investigated with spin- and angle-resolved inverse photoemission. Measurements were performed along Γ N (Γ M with respect to the Ni(111) surface Brillouin zone), where the quantization axis of the Rashba-spin component is collinear to the easy magnetization axis. Remarkably, the observed unoccupied Ni-derived exchange-split states change their energy-momentum dispersion upon magnetization reversal. Density functional theory calculations show that this phenomenon is a consequence of substrate-induced spin-orbit coupling within the Ni adlayers.
[1] P. Moras et al., Phys. Rev. B 91, 195410 (2015)
[2] P.J. Grenz et al., J. Phys.: Condens. Matter 33, 285504 (2021)