Dresden 2026 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 2: Electronic structure of surfaces: Spectroscopy, surface states I
O 2.1: Vortrag
Montag, 9. März 2026, 10:30–10:45, HSZ/0201
Unveiling the spin texture of the topological surface state in Sb(111) — •Xin Liang Tan1, Arthur Ernst2, Anders Christian Mathisen1, Stefanie Suzanne Brinkman1, Fabian Göhler1, Chul Hee Min1, and Hendrik Bentmann1 — 1Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway — 2Institut für Theoretische Physik, Johannes Kepler Universität, A 4040 Linz, Austria
Spin-resolved momentum microscopy is a powerful tool for mapping the complete Fermi surface and spin texture of two-dimensional electronic states. Here, we present spin- and momentum-resolved Sb(111) surface state, a benchmark system exhibiting strong spin-orbit coupling and a non-trivial topology. Using a continuous-wave vacuum-ultraviolet laser (hν = 6 eV) for photoexcitation, we achieve efficient k-space mapping of the in-plane spin-polarization components over the full surface Brillouin zone. We will present experimental data obtained for different light polarizations. Our results are compared to first-principles calculations.
[1] X.L. Tan et al., Ultramicroscopy 253, 113820 (2023).
[2] C. Tusche et al., Ultramicroscopy 159, 520 (2015).
[3] D. Hsieh et al., Science 323, 919-922(2009).
[4] H. Ishida. Phys., Rev. B 90, 235422 (2014).
Keywords: Spin-resolved momentum microscopy; Spin-polarized surface state; Imaging spin-filter; Laser photoemission