Bernardes, Esmerindo S. and Schliemann, John and Egues, J. Carlos and Loss, Daniel (2007) Spin-orbit interaction in symmetric wells and cycloidal orbits without magnetic fields. Phys. Rev. Lett. 99, p. 976603.
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We investigate the spin-orbit (s-o) interaction in two-dimensional electron gases (2DEGs) in quantum wells with two subbands. From the Kane model, we derive a new inter-subband-induced s-o coupling which resembles the functional form of the Rashba s-o -- but is non-zero even in structures. This follows from the distinct parity of the confined states (even/odd) which obliterates the need for asymmetric potentials. Interestingly, our s-o interaction gives rise to an unusual of spin-polarized electrons with cycloidal trajectories magnetic fields. We also predict a sizable effective-mass renormalization due to the s-o--induced subband warping.
|Institutions:||Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group John Schliemann|
|Projects:||SFB 689: Spinphänomene in reduzierten Dimensionen|
|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||20 Mar 2007|
|Last Modified:||16 May 2012 09:43|