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    Current-driven Rashba Field in a Magnetic Quantum Well

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    Type
    Preprint
    Authors
    Hariri, Abdulkarim
    Alawein, Meshal cc
    Manchon, Aurelien
    KAUST Department
    King Abdullah University of Science and Technology (KAUST), Physical Science and Engineering Division (PSE), Thuwal 23955-6900, Saudi Arabia
    Electrical Engineering Program
    Date
    2019-07-16
    Permanent link to this record
    http://hdl.handle.net/10754/660674
    
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    Abstract
    In materials lacking inversion symmetry, the spin-orbit coupling enables the direct connection between the electron's spin and its linear momentum, a phenomenon called inverse spin galvanic effect. In magnetic materials, this effect promotes current-driven torques that can be used to control the magnetization direction electrically. In this work, we investigate the current-driven inverse spin galvanic effect in a quantum well consisting in a magnetic material embedded between dissimilar insulators. Assuming the presence of Rashba spin-orbit coupling at the interfaces, we investigate the nature of the non-equilibrium spin density and the influence of the quantum well parameters. We find that the torque is governed by the interplay between the number of states participating to the transport and their spin chirality, the penetration of the wave function into the tunnel barriers, and the strength of the Rashba term.
    Sponsors
    This work was supported by the King Abdullah University of Science and Technology (KAUST).
    Publisher
    arXiv
    arXiv
    1907.07116
    Additional Links
    https://arxiv.org/pdf/1907.07116
    Collections
    Preprints; Electrical Engineering Program

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