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    Coulomb-Induced Rashba Spin-Orbit Coupling in Semiconductor Quantum Wells

    Chalaev, Oleg
    Vignale, Giovanni, 1957-
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    [PDF] CoulombInducedRashbaSpinOrbit.pdf (448.0Kb)
    Date
    2010
    Format
    Article
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    Abstract
    In the absence of an external field, the Rashba spin-orbit interaction (SOI) in a two-dimensional electron gas in a semiconductor quantum well arises entirely from the screened electrostatic potential of ionized donors. We adjust the wave functions of a quantum well so that electrons occupying the first (lowest) subband conserve their spin projection along the growth axis (sz), while the electrons occupying the second subband precess due to Rashba SOI. Such a specially designed quantum well may be used as a spin relaxation trigger: electrons conserve sz when the applied voltage (or current) is lower than a certain threshold V*; higher voltage switches on the Dyakonov-Perel spin relaxation.
    URI
    http://hdl.handle.net/10355/7622
    Citation
    Phys. Rev. Lett. 104, 226601 (2010)
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