Picosecond spin relaxation of acceptor-bound exciton in wurtzite GaN

Hirotaka Otake; Takamasa Kuroda; Atsushi Tackeuchi; Kazuyoshi Taniguchi; Takako Chinone; Ji Hao Liang; Masataka Kajikawa; Naochika Horio

doi:10.1063/1.2730386

Picosecond spin relaxation of acceptor-bound exciton in wurtzite GaN

Hirotaka Otake, Takamasa Kuroda, Atsushi Tackeuchi, Kazuyoshi Taniguchi, Takako Chinone, Ji Hao Liang, Masataka Kajikawa, Naochika Horio

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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 spin relaxation times of 1.40-1.14 ps. The spin relaxation time, τ_s, is found to be proportional to T^-0.175, where T is the temperature. This temperature dependence is quite weak compared with that of A-band free excitons showing τ ≅ T^-1.41 at 150-225K.

Original language	English
Title of host publication	AIP Conference Proceedings
Pages	1315-1316
Number of pages	2
Volume	893
DOIs	https://doi.org/10.1063/1.2730386
Publication status	Published - 2007
Event	28th International Conference on the Physics of Semiconductors, ICPS 2006 - Vienna Duration: 2006 Jul 24 → 2006 Jul 28

Other

Other	28th International Conference on the Physics of Semiconductors, ICPS 2006
City	Vienna
Period	06/7/24 → 06/7/28

Fingerprint

wurtzite

excitons

relaxation time

pumps

reflectance

temperature dependence

probes

temperature

Keywords

Exciton
GaN
Spin
Spin relaxation
Wurtzite

ASJC Scopus subject areas

Physics and Astronomy(all)

Cite this

Otake, H., Kuroda, T., Tackeuchi, A., Taniguchi, K., Chinone, T., Liang, J. H., ... Horio, N. (2007). Picosecond spin relaxation of acceptor-bound exciton in wurtzite GaN. In AIP Conference Proceedings (Vol. 893, pp. 1315-1316) https://doi.org/10.1063/1.2730386

Picosecond spin relaxation of acceptor-bound exciton in wurtzite GaN. / Otake, Hirotaka; Kuroda, Takamasa; Tackeuchi, Atsushi; Taniguchi, Kazuyoshi; Chinone, Takako; Liang, Ji Hao; Kajikawa, Masataka; Horio, Naochika.

AIP Conference Proceedings. Vol. 893 2007. p. 1315-1316.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Otake, H, Kuroda, T, Tackeuchi, A, Taniguchi, K, Chinone, T, Liang, JH, Kajikawa, M & Horio, N 2007, Picosecond spin relaxation of acceptor-bound exciton in wurtzite GaN. in AIP Conference Proceedings. vol. 893, pp. 1315-1316, 28th International Conference on the Physics of Semiconductors, ICPS 2006, Vienna, 06/7/24. https://doi.org/10.1063/1.2730386

Otake H, Kuroda T, Tackeuchi A, Taniguchi K, Chinone T, Liang JH et al. Picosecond spin relaxation of acceptor-bound exciton in wurtzite GaN. In AIP Conference Proceedings. Vol. 893. 2007. p. 1315-1316 https://doi.org/10.1063/1.2730386

Otake, Hirotaka ; Kuroda, Takamasa ; Tackeuchi, Atsushi ; Taniguchi, Kazuyoshi ; Chinone, Takako ; Liang, Ji Hao ; Kajikawa, Masataka ; Horio, Naochika. / Picosecond spin relaxation of acceptor-bound exciton in wurtzite GaN. AIP Conference Proceedings. Vol. 893 2007. pp. 1315-1316

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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 spin relaxation times of 1.40-1.14 ps. The spin relaxation time, τs, is found to be proportional to T-0.175, where T is the temperature. This temperature dependence is quite weak compared with that of A-band free excitons showing τ ≅ T-1.41 at 150-225K.",

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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 spin relaxation times of 1.40-1.14 ps. The spin relaxation time, τs, is found to be proportional to T-0.175, where T is the temperature. This temperature dependence is quite weak compared with that of A-band free excitons showing τ ≅ T-1.41 at 150-225K.

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Access to Document

10.1063/1.2730386