Nanosecond excitonic spin relaxation in cubic GaN

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


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
Issue number16
Publication statusPublished - 2006 Apr 17

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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