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    Spin-orbit torque in two-dimensional antiferromagnetic topological insulators

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    PhysRevB.95.035422.pdf
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    Type
    Article
    Authors
    Ghosh, Sumit
    Manchon, Aurelien cc
    KAUST Department
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Spintronics Theory Group
    KAUST Grant Number
    OSR-2015- CRG4-2626
    Date
    2017-01-23
    Permanent link to this record
    http://hdl.handle.net/10754/622846
    
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    Abstract
    We investigate spin transport in two-dimensional ferromagnetic (FTI) and antiferromagnetic (AFTI) topological insulators. In the presence of an in-plane magnetization AFTI supports zero energy modes, which enables topologically protected edge conduction at low energy. We address the nature of current-driven spin torque in these structures and study the impact of spin-independent disorder. Interestingly, upon strong disorder the spin torque develops an antidamping component (i.e., even upon magnetization reversal) along the edges, which could enable current-driven manipulation of the antiferromagnetic order parameter. This antidamping torque decreases when increasing the system size and when the system enters the trivial insulator regime.
    Citation
    Ghosh S, Manchon A (2017) Spin-orbit torque in two-dimensional antiferromagnetic topological insulators. Physical Review B 95. Available: http://dx.doi.org/10.1103/PhysRevB.95.035422.
    Sponsors
    This work was supported by the King Abdullah University of Science and Technology (KAUST) through the Office of Sponsored Research (OSR) [Grant No. OSR-2015- CRG4-2626].
    Publisher
    American Physical Society (APS)
    Journal
    Physical Review B
    DOI
    10.1103/PhysRevB.95.035422
    arXiv
    1609.01174
    Additional Links
    http://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.035422
    ae974a485f413a2113503eed53cd6c53
    10.1103/PhysRevB.95.035422
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Spintronics Theory Group; Material Science and Engineering Program

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