Dresden 2020 – scientific programme
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O: Fachverband Oberflächenphysik
O 48: Poster Session - Electronic Structure of Surfaces: Spectroscopy, Surface States
O 48.2: Poster
Tuesday, March 17, 2020, 18:15–20:00, P2/EG
Magnetic adsorbates on W(110): A comparative study of the electronic structure — •Pascal J. Grenz1, Marcel Holtmann1, Koji Miyamoto2, Eike F. Schwier2, Shiv Kumar2, Taichi Okuda2, and Markus Donath1 — 1Institute of Physics, Westfälische-Wilhelms-Universität Münster, Germany — 2Hiroshima Synchrotron Radiation Center, Japan
We used spin- and angle-resolved photoelectron spectroscopy to study the electronic structure of ultrathin Ni and Co films on W(110) and compare the results with those of Fe/W(110) [1]. W(110) exhibits a Dirac-cone-like surface state [2] which is topologically non-trivial and protected by mirror symmetry [3]. Magnetic adsorbates on W(110) are a model system to study the influence of exchange interaction on topologically protected surface states. In this contribution, we show that Co and Ni have a distinctly different influence on the Dirac-cone-like surface state than Fe. Additionally, we investigated the dispersion and spin structure of interface states for sub-monolayer and monolayer coverages of Co/W(110) and Ni/W(110).
[1] K. Honma et al., Phys. Rev. Lett. 115, 266401 (2015). [2] K. Miyamoto et al., Phys. Rev. Lett. 108, 066808 (2012). [3] D. Thonig et al., Phys. Rev. B 94, 155132 (2016).