Nanosecond excitonic spin relaxation in cubic GaN

Atsushi Tackeuchi, Hirotaka Otake, Yusuke Ogawa, Takafumi Ushiyama, Taisuke Fujita, Fumiyoshi Takano, Hiro Akinaga

    Research output: Contribution to journalArticle

    18 Citations (Scopus)

    Abstract

    The excitonic spin relaxation process in cubic GaN is observed by spin-dependent pump and probe reflectance measurements with subpicosecond time resolution. The spin polarization presents at temperatures lower than 100 K. The spin relaxation times at 15-75 K are found to be longer than 5 ns and short spin relaxation times on the picosecond order are not present. Although these long spin relaxation times are in striking contrast to the subpicosecond spin relaxation of A -band free excitons in hexagonal GaN, they are consistent with the dependence that spin relaxation time becomes longer for wider-band gap zinc blende semiconductors.

    Original languageEnglish
    Article number162114
    JournalApplied Physics Letters
    Volume88
    Issue number16
    DOIs
    Publication statusPublished - 2006 Apr 17

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    relaxation time
    zinc
    excitons
    pumps
    broadband
    reflectance
    probes
    polarization

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

    Cite this

    Tackeuchi, A., Otake, H., Ogawa, Y., Ushiyama, T., Fujita, T., Takano, F., & Akinaga, H. (2006). Nanosecond excitonic spin relaxation in cubic GaN. Applied Physics Letters, 88(16), [162114]. https://doi.org/10.1063/1.2195779

    Nanosecond excitonic spin relaxation in cubic GaN. / Tackeuchi, Atsushi; Otake, Hirotaka; Ogawa, Yusuke; Ushiyama, Takafumi; Fujita, Taisuke; Takano, Fumiyoshi; Akinaga, Hiro.

    In: Applied Physics Letters, Vol. 88, No. 16, 162114, 17.04.2006.

    Research output: Contribution to journalArticle

    Tackeuchi, A, Otake, H, Ogawa, Y, Ushiyama, T, Fujita, T, Takano, F & Akinaga, H 2006, 'Nanosecond excitonic spin relaxation in cubic GaN', Applied Physics Letters, vol. 88, no. 16, 162114. https://doi.org/10.1063/1.2195779
    Tackeuchi A, Otake H, Ogawa Y, Ushiyama T, Fujita T, Takano F et al. Nanosecond excitonic spin relaxation in cubic GaN. Applied Physics Letters. 2006 Apr 17;88(16). 162114. https://doi.org/10.1063/1.2195779
    Tackeuchi, Atsushi ; Otake, Hirotaka ; Ogawa, Yusuke ; Ushiyama, Takafumi ; Fujita, Taisuke ; Takano, Fumiyoshi ; Akinaga, Hiro. / Nanosecond excitonic spin relaxation in cubic GaN. In: Applied Physics Letters. 2006 ; Vol. 88, No. 16.
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