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. [Nat. Mater. 13, 1085 (2014), 10.1038/nmat4107]. 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.
- Publication:
-
Physical Review B
- Pub Date:
- June 2016
- DOI:
- 10.1103/PhysRevB.93.245143
- arXiv:
- arXiv:1603.00181
- Bibcode:
- 2016PhRvB..93x5143M
- Keywords:
-
- Condensed Matter - Strongly Correlated Electrons;
- Condensed Matter - Materials Science
- E-Print:
- Phys. Rev. B 93, 245143 (2016)