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    Optical properties of metallic (III, Mn)V ferromagnetic semiconductors in the infrared to visible range

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    PhysRevB.70.245211.pdf (119.3Kb)
    Date
    2004
    Author
    Hankiewicz, EM
    Jungwirth, T.
    Dietl, T.
    Timm, C.
    Sinova, Jairo.
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    Abstract
    We report on a study of the ac conductivity and magneto-optical properties of metallic ferromagnetic (III, Mn)V semiconductors in the infrared to visible spectrum at zero temperature. Our analysis is based on the successful kinetic exchange model for (III, Mn)V ferromagnetic semiconductors. We perform the calculations within the Kubo formalism and treat the disorder effects pertubatively within the Born approximation, valid for the metallic regime. We consider an eight-band Kohn-Luttinger model (six valence bands plus two conduction bands) as well as a ten-band model with additional dispersionless bands simulating phenomenologically the upper-mid-gap states induced by antisite and interstitial impurities. These models qualitatively account for optical-absorption experiments and predict new features in the mid-infrared Kerr angle and magnetic-circular-dichroism properties as a function of Mn concentration and free carrier density.
    URI
    http://dx.doi.org/10.1103/PhysRevB.70.245211
    http://hdl.handle.net/1969.1/146806
    Description
    Journals published by the American Physical Society can be found at http://journals.aps.org/
    Subject
    III-V SEMICONDUCTORS
    MAGNETIC-CIRCULAR-DICHROISM
    HEAVILY DOPED GAAS
    LOW-TEMPERATURE
    MAGNETOTRANSPORT PROPERTIES
    ELECTRONIC-STRUCTURE
    CURIE-TEMPERATURE
    GALLIUM-ARSENIDE
    GA1-XMNXAS
    (GA,MN)AS
    Physics
    Department
    Physics and Astronomy
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    Citation
    EM Hankiewicz, T. Jungwirth, T. Dietl, C. Timm and Jairo Sinova. Phys.Rev.B 70 245211 2004."Copyright (2004) by the American Physical Society."

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