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

doi:10.1002/pssc.200672885

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

School of Advanced Science and Engineering

Research output: Contribution to journal › Conference article › peer-review

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 language	English
Pages (from-to)	4303-4306
Number of pages	4
Journal	Physica Status Solidi (C) Current Topics in Solid State Physics
Volume	3
Issue number	12
DOIs	https://doi.org/10.1002/pssc.200672885
Publication status	Published - 2006 Dec 1
Event	4th International Conference on Physics and Applications of Spin-related Phenomena in Semiconductors, PASPS-IV - Sendai, Japan Duration: 2006 Aug 15 → 2006 Aug 18

ASJC Scopus subject areas

Condensed Matter Physics

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Picosecond spin relaxations of acceptor-bound exciton and A-band free exciton in wurtzite GaN. / Tackeuchi, A.; Otake, H.; Fujita, T.; Kuroda, T.; Chinone, T.; Liang, J. H.; Kajikawa, M.

In: Physica Status Solidi (C) Current Topics in Solid State Physics, Vol. 3, No. 12, 01.12.2006, p. 4303-4306.

Research output: Contribution to journal › Conference article › peer-review

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title = "Picosecond spin relaxations of acceptor-bound exciton and A-band free exciton in wurtzite GaN",

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.",

author = "A. Tackeuchi and H. Otake and T. Fujita and T. Kuroda and T. Chinone and Liang, {J. H.} and M. Kajikawa",

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T1 - Picosecond spin relaxations of acceptor-bound exciton and A-band free exciton in wurtzite GaN

AU - Tackeuchi, A.

AU - Otake, H.

AU - Fujita, T.

AU - Kuroda, T.

AU - Chinone, T.

AU - Liang, J. H.

AU - Kajikawa, M.

PY - 2006/12/1

Y1 - 2006/12/1

N2 - 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.

AB - 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.

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JO - Physica Status Solidi C: Conferences

JF - Physica Status Solidi C: Conferences

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T2 - 4th International Conference on Physics and Applications of Spin-related Phenomena in Semiconductors, PASPS-IV

Y2 - 15 August 2006 through 18 August 2006

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

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