Rashba-type spin splitting at Au(111) beyond the Fermi level: the other part of the story

We present a combined experimental and theoretical study of spin–orbit-induced spin splittings in the unoccupied surface electronic structure of the prototypical Rashba system Au(111). Spin- and angle-resolved inverse-photoemission measurements reveal a Rashba-type spin splitting in the unoccupied p...

Authors: Wissing, Sune N. P.
Eibl, Christian
Zumbülte, Anna
Schmidt, A. B.
Braun, J.
Minár, J.
Ebert, H.
Donath, M.
Division/Institute:FB 11: Physik
Document types:Article
Media types:Text
Publication date:2013
Date of publication on miami:19.02.2014
Modification date:21.01.2020
Edition statement:[Electronic ed.]
Source:New Journal of Physic 15 (2013) 10
DDC Subject:530: Physik
License:CC BY 3.0
Language:English
Notes:Finanziert durch den Open-Access-Publikationsfonds 2013/2014 der Deutschen Forschungsgemeinschaft (DFG) und der Westfälischen Wilhelms-Universität Münster (WWU Münster).
Format:PDF document
URN:urn:nbn:de:hbz:6-44319493412
Permalink:http://nbn-resolving.de/urn:nbn:de:hbz:6-44319493412
Other Identifiers:DOI: 10.1088/1367-2630/15/10/105001
Digital documents:1367-2630_15_10_105001.pdf

We present a combined experimental and theoretical study of spin–orbit-induced spin splittings in the unoccupied surface electronic structure of the prototypical Rashba system Au(111). Spin- and angle-resolved inverse-photoemission measurements reveal a Rashba-type spin splitting in the unoccupied part of the L-gap surface state. With increasing momentum parallel to the surface, the spectral intensity is lowered and the spin splitting vanishes as the surface state approaches the band-gap boundary. Furthermore, we observe significantly spin-dependent peak positions and intensities for transitions between unoccupied sp-like bulk bands. Possible reasons for this behavior are considered: initial and final-state effects as well as the transition itself, which is controlled by selection rules depending on the symmetry of the involved states. Based on model calculations, we identify the initial states as origin of the observed Rashba-type spin effects in bulk transitions.