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O: Fachverband Oberflächenphysik
O 60: Focus Session: Unoccupied States by Inverse Photoemission I
O 60.7: Vortrag
Mittwoch, 11. März 2026, 12:15–12:30, WILL/A317
On the sign of the Rashba parameter in image-potential states — •Fabian Schöttke1, Kaishu Kawaguchi2, Kenta Kuroda3, Peter Krüger1, Thorsten Deilmann1, Sven Schemmelmann1, Ayumi Harasawa2, Shuntaro Tani2, Yohei Kobayashi2, Takeshi Kondo2, and Markus Donath1 — 1Universität Münster, Germany — 2Institute for Solid State Physics, The University of Tokyo, Japan — 3Hiroshima University, Hiroshima, Japan
Image-potential surface states are simple model systems, where spin-dependent effects can be studied in view of spintronic applications. The Rashba effect in surface states at high-Z materials is related to both the strong spin-orbit interaction in heavy atoms and the orbital angular momentum arising from the inversion-symmetry breaking at the surface. Our studies with spin- and angle-resolved inverse photo-emission and three-photon photoemission on image-potential states at Re(0001), Bi2Se3 and Bi2Te3 show a clear correlation between orbital angular momentum and spin directions. A key factor of our analysis is spin resolution, which enhances the effective resolution to separate spectral features considerably, provided they have different spin character.
Keywords: Inverse photoemission; Rashba effect; Orbital angular momentum