Analysis of electric-field-induced spin splitting in wide modulation-doped quantum wells

@article{Ekenberg2008AnalysisOE,
  title={Analysis of electric-field-induced spin splitting in wide modulation-doped quantum wells},
  author={Ulf Ekenberg and Dejan M. Gvozdi{\'c}},
  journal={Physical Review B},
  year={2008},
  volume={78},
  pages={205317}
}
We analyze the proper inclusion of electric-field-induced spin splittings in the framework of the envelope function approximation. We argue that the Rashba effect should be included in the form of a macroscopic potential as diagonal terms in a multiband approach rather than the commonly used Rashba term dependent on k and electric field. It is pointed out that the expectation value of the electric field in a subband is sometimes not unique because the expectation values can even have opposite… 
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