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

Research output: Contribution to journalConference article

Abstract

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.

Original languageEnglish
Pages (from-to)4303-4306
Number of pages4
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Volume3
Issue number12
DOIs
Publication statusPublished - 2006 Dec 1
Event4th International Conference on Physics and Applications of Spin-related Phenomena in Semiconductors, PASPS-IV - Sendai, Japan
Duration: 2006 Aug 152006 Aug 18

    Fingerprint

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this