Magnetoluminescence Study on the Effective Mass Anisotropy of CuPtB-ordered GaInP2 Alloys

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    Photoluminescence measurements in a magnetic field between 0 and 13.6 T were carried out on CuPtB-ordered GaInP at liquid-helium temperature. Four samples of different degrees of ordering (.eta, varying from 0 to 0.54) were studied. Experimental results show that the ordering not only induces a band-gap reduction and valence-band splitting, it also causes changes in effective masses and aneffective mass anisotropy. By measuring and analyzing the magnetoluminescence with the magnetic field aligned along both ordering (the [111]) and growth (the [001]) directions, we demonstrate that, for the band-edge excitonic state, the reduced mass in the plane perpendicular to the ordering direction is smaller than that in the ordering direction and also smaller than that of a disordered alloy. The exciton binding energy is found nearly independent of the degree of ordering, in agreement with theoretical preditions.
    Original languageAmerican English
    Pages (from-to)2814-2817
    Number of pages4
    JournalJournal of Applied Physics
    Issue number6
    StatePublished - 1997

    Bibliographical note

    Work performed by National Renewable Energy Laboratory, Sandia National Laboratories, and 4. Physikalisches Institut, Universtdt Stuttgart

    NREL Publication Number

    • NREL/JA-451-21605


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