Interband spin-orbit coupling between anti-parallel spin states in Pb quantum well states

@article{Slomski2013InterbandSC,
  title={Interband spin-orbit coupling between anti-parallel spin states in Pb quantum well states},
  author={Bartosz Slomski and Gabriel Landolt and Stefan Muff and Fabian Meier and J{\"u}rg Osterwalder and J. Hugo Dil},
  journal={New Journal of Physics},
  year={2013},
  volume={15},
  pages={125031}
}
Using spin and angle-resolved photoemission spectroscopy we investigate a momentum region in Pb quantum well states on Si(111) where hybridization between Rashba-split bands alters the band structure significantly. Starting from the Rashba regime where the dispersion of the quasi-free two-dimensional electron gas is well described by two spin-polarized parabolas, we find a breakdown of the Rashba behavior which manifests itself (i) in a spin splitting that is no longer proportional to the in… 

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