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    Power dependence of pure spin current injection by quantum interference

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    Zhao Power dependence abstract.pdf (254.7Kb)
    Issue Date
    2009-04
    Author
    Ruzicka, Brian Andrew
    Zhao, Hui
    Publisher
    American Physical Society
    Type
    Other
    Version
    http://arxiv.org/abs/1003.1974
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    Abstract
    We investigate the power dependence of pure spin current injection in GaAs bulk and quantumwell samples by a quantum interference and control technique. Spin separation is measured as a function of the relative strength of the two transition pathways driven by two laser pulses. By keeping the relaxation time of the current unchanged, we are able to relate the spin separation to the injected average velocity. We find that the average velocity is determined by the relative strength of the two transitions in the same way as in classical interference. Based on this, we conclude that the density of injected pure spin current increases monotonically with the excitation laser intensities. The experimental results are consistent with theoretical calculations based on Fermi’s golden rule.
    Description
    Permissions were not obtained for sharing the full text of this article. Full text available from the American Physical Society and from arXiv. See links in this record.
    URI
    http://hdl.handle.net/1808/7355
    DOI
    https://doi.org/10.1103/PhysRevB.79.155204
    Collections
    • Physics and Astronomy Scholarly Works [1530]
    Citation
    B.A. Ruzicka and Hui Zhao, Power dependence of pure spin current injection by quantum interference. Physical Review B 79, 155204 (2009) http://link.aps.org/doi/10.1103/PhysRevB.79.155204

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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