Dresden 2026 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 84: 2D Materials: Electronic structure, excitations, etc. III (joint session O/HL/TT)
O 84.6: Vortrag
Donnerstag, 12. März 2026, 16:15–16:30, HSZ/0204
TMDC surfaces as scattering targets in spin-polarization detectors: A case study of MoS2 — •Christoph Angrick1, Annika Henriksen1, Nicole Edossa1, Andre Reimann1, Moritz Ewert2,3, Lars Buß2,3, Jens Falta3, Jan Ingo Flege2,3, and Markus Donath1 — 1University of Münster, Germany — 2Brandenburg University of Technology Cottbus-Senftenberg, Germany — 3University of Bremen, Germany
Spin-polarization detectors are employed in photoemission experiments to reveal the spin texture of electronic states. One well-proven approach is based on the VLEED process, where the spin-dependent electron reflection from targets influenced by exchange and/or spin-orbit interaction is used. The suitability of a target must be investigated beforehand [1,2]. In this talk, a first impression of TMDC-based detectors is given [3]. The spin-dependent electron reflectivity of spin-orbit-influenced MoS2 is measured over a wide range of incident energies and angles for the following samples: a single layer of MoS2 on Au(111) and cleaved MoS2 single-crystal surfaces. On the basis of the resulting maps for the electron reflectivity, Sherman function, and figure of merit, promising features of MoS2 for use in spin-polarization detection are discussed.
[1] Thiede et al., Phys. Rev. Applied 1, 054003 (2014).
[2] Angrick et al., J. Phys.: Condens. Matter 33, 115001 (2020).
[3] Angrick et al., Phys. Rev. B, accepted for publication (2025).
Keywords: Very-low-energy electron diffraction (VLEED); Spin-polarization detection; Transition metal dichalcogenide (TMDC); Spin-resolved photoemission