Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 99: Focus Session: Spins on Surfaces III (joint session O/MA)
O 99.6: Vortrag
Freitag, 5. April 2019, 12:00–12:15, H24
Spin-dependent electron reflection at W(110) — •Christoph Angrick1, Jürgen Braun2, Hubert Ebert2, and Markus Donath1 — 1Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Germany — 2Department Chemie, Ludwig-Maximilians-Universität München, Germany
The knowledge of the occupied, spin-dependent electronic structure of surfaces offers insights into spin phenomena and their possible use in spintronic devices. This knowledge can be obtained by photoemission techniques with subsequent spin-polarization analysis of the photoelectrons. The spin-polarization analysis relies on spin-dependent electron scattering and can be used in single- and multichannel modes [1,2,3,4].
Due to its strong spin-orbit coupling the W(110) surface is a promising candidate for the use as a scattering target in a spin-polarization analyzer. Therefore, the spin-dependent electron reflectivity of the W(110) surface was experimentally investigated for a wide range of incident electron energies and polar angles and compared with calculations. Two possible working points for spin-polarization analysis with a reversed sign in the Sherman function were found. The characteristics of the working points are discussed in view of an implementation in a single- and multichannel spin-polarization analyzer.
[1] Winkelmann et al., Rev. Sci. Instrum. 79, 083303 (2008).
[2] Okuda et al., Rev. Sci. Instrum. 79, 123117 (2008).
[3] Kolbe et al., Phys. Rev. Lett. 107, 207601 (2011).
[4] Tusche et al., Appl. Phys. Lett. 99, 032505 (2011).