Picosecond spin relaxations of acceptor-bound exciton and A-band free exciton in wurtzite GaN

A. Tackeuchi*, H. Otake, T. Fujita, T. Kuroda, T. Chinone, J. H. Liang, M. Kajikawa

*この研究の対応する著者

研究成果査読

抄録

The spin relaxation process of acceptor-bound excitons in wurtzite GaN is observed by spin-dependent pump and probe reflectance measurement with subpicosecond time resolution. The time evolutions measured at 15-50 K have a single exponential component corresponding to the electron spin relaxation time of 1.40-1.14 ps. These spin relaxation times are slightly longer than those of the A-band free excitons of 0.47-0.25 ps in GaN at 150-225 K. The spin relaxation time is found to be proportional to T-0.175, where T is the temperature. This weak temperature dependence indicates that the main spin relaxation mechanism is the Bir-Aronov-Pikus process.

本文言語English
ページ(範囲)4303-4306
ページ数4
ジャーナルPhysica Status Solidi (C) Current Topics in Solid State Physics
3
12
DOI
出版ステータスPublished - 2006 12 1
イベント4th International Conference on Physics and Applications of Spin-related Phenomena in Semiconductors, PASPS-IV - Sendai, Japan
継続期間: 2006 8 152006 8 18

ASJC Scopus subject areas

  • 凝縮系物理学

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