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O: Fachverband Oberflächenphysik
O 124: Development of Novel Methods II
O 124.12: Vortrag
Freitag, 20. März 2020, 13:15–13:30, WIL C107
Spin-dependent electron reflection from Au(111) and single-layer MoS2/Au(111): A comparative study — •Christoph Angrick1, Andre Reimann1, Nicole Mutzke1, 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
In the field of spin-integrated photoemission experiments, major parts of the occupied electronic band structure are obtained in a short time by parallel detection of electrons with different energies and/or angles. Spin-polarizing electron mirrors (spin mirrors) are added to the experimental setups to obtain spin resolution [1,2]. The concept of these spin mirrors is based on the reflection of very-low-energy electrons from targets influenced by spin-orbit or exchange interaction.
In this work, Au(111) and single-layer MoS2/Au(111) are put to a test as scattering targets. Both are influenced by spin-orbit interaction and therefore, are possible candidates for the use as a spin mirror. Maps of the reflectivity, Sherman function and figure of merit are derived from spin-dependent very-low-energy electron reflection measurements for a wide range of incident electron polar and azimuthal angles and energies [3]. The targets are compared with respect to preparation procedure, target stability and efficiency.
[1] Kolbe et al., Phys. Rev. Lett. 107, 207601 (2011).
[2] Tusche et al., Appl. Phys. Lett. 99, 032505 (2011).
[3] Thiede et al., Phys. Rev. Applied 1, 054003 (2014).