Absence of giant spin splitting in the two-dimensional electron liquid at the surface of SrTiO3 (001)
Abstract
We reinvestigate the putative giant spin splitting at the surface of SrTiO3 reported by Santander-Syro et al. [Nature Mat. 13, 1085 (2014)]. Our spin- and angle-resolved photoemission experiments on fractured (001) oriented surfaces supporting a two-dimensional electron liquid with high carrier density show no detectable spin polarization in the photocurrent. We demonstrate that this result excludes a giant spin splitting while it is consistent with the unconventional Rashba-like splitting seen in band structure calculations that reproduce the experimentally observed ladder of quantum confined subbands.
Citation
McKeown Walker , S , Riccò , S , Bruno , F Y , de la Torre , A , Tamai , A , Golias , E , Varykhalov , A , Marchenko , D , Hoesch , M , Bahramy , M S , King , P D , Sánchez-Barriga , J & Baumberger , F 2016 , ' Absence of giant spin splitting in the two-dimensional electron liquid at the surface of SrTiO 3 (001) ' , Physical Review. B, Condensed matter and materials physics , vol. 93 , no. 24 , 245143 . https://doi.org/10.1103/PhysRevB.93.245143
Publication
Physical Review. B, Condensed matter and materials physics
Status
Peer reviewed
ISSN
1098-0121Type
Journal article
Collections
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