Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 14: Electronic Structure of Surfaces: Magnetism and Spin Phenomena II
O 14.10: Vortrag
Montag, 20. März 2017, 17:15–17:30, WIL C107
Vectorial Multichannel Spin-Polarimetry Using an Ir(001) Imaging Spin Filter — •Erik Schaefer1, Stephan Borek2, Jürgen Braun2, Ján Minár2,3, Hubert Ebert2, Katerina Medjanik1, Gerd Schönhense1, and Hans-Joachim Elmers1 — 1Institut of Physics, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany — 2Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstraße 5-13, 81377 München, Germany — 3New Technologies-Research Centre, University of West Bohemia, Univerzitni 8, 306 14 Pilsen, Czech Republic
A newly developed high-performance imaging spin filter system based on a large Ir(001) scattering crystal tackles the issue of previously inefficient spin-resolving photoemission spectrometers. An increase of the effective figure of merit by a factor of over 103 in contrast to standard single-channel detectors is presented together with a detailed characterization of the experimental setup. The spin filter efficiency is analyzed by mapping a broad range of scattering energy and azimuthal angle. A high sensitivity to spin-components parallel and perpendicular to the scattering plane is observed under certain scattering conditions. An additional spin rotator element allows the independent determination of the two in-plane components of the spin vector. By combining three or six scattering conditions a vectorial spin analysis becomes possible for both, magnetic and non-magnetic samples.