Strong anisotropic spin dynamics in narrow n-InGaAs/AlGaAs (110) quantum wells

K. Morita; H. Sanada; S. Matsuzaka; C. Y. Hu; Y. Ohno; H. Ohno

doi:10.1063/1.2112193

Strong anisotropic spin dynamics in narrow n-InGaAs/AlGaAs (110) quantum wells

K. Morita, H. Sanada, S. Matsuzaka, C. Y. Hu, Y. Ohno, H. Ohno

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Abstract

Anisotropic spin dynamics of two-dimensional electrons in strained n-InGaAsAlGaAs (110) quantum wells (QWs) is investigated by a time-resolved Faraday rotation technique. Strong anisotropy of the relaxation time for the electron spins in parallel (τ∥) and perpendicular (τ⊥) to the QWs is observed (τ⊥ τ∥ ∼60) at 150 K as a result of the enhanced D'yakonov-Perel' (DP) spin relaxation mechanism. At 5 K, an anisotropic feature of the spin relaxation time is also observed in the presence of in-plane magnetic field, suggesting that the DP mechanism is effective for low-temperature spin relaxation.

Original language	English
Article number	171905
Pages (from-to)	1-3
Number of pages	3
Journal	Applied Physics Letters
Volume	87
Issue number	17
DOIs	https://doi.org/10.1063/1.2112193
Publication status	Published - 2005 Oct 24

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Strong anisotropic spin dynamics in narrow n-InGaAs/AlGaAs (110) quantum wells",

abstract = "Anisotropic spin dynamics of two-dimensional electrons in strained n-InGaAsAlGaAs (110) quantum wells (QWs) is investigated by a time-resolved Faraday rotation technique. Strong anisotropy of the relaxation time for the electron spins in parallel (τ∥) and perpendicular (τ⊥) to the QWs is observed (τ⊥ τ∥ ∼60) at 150 K as a result of the enhanced D'yakonov-Perel' (DP) spin relaxation mechanism. At 5 K, an anisotropic feature of the spin relaxation time is also observed in the presence of in-plane magnetic field, suggesting that the DP mechanism is effective for low-temperature spin relaxation.",

author = "K. Morita and H. Sanada and S. Matsuzaka and Hu, {C. Y.} and Y. Ohno and H. Ohno",

note = "Funding Information: The authors wish to acknowledge K. Ohtani, M. Kohda for useful discussions. This work was partly supported by Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan Society for the Promotion of Science (JSPS), and 21st Century COE program “System Construction of Global-Network Oriented Information Electronics,” at Tohoku University. ",

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T1 - Strong anisotropic spin dynamics in narrow n-InGaAs/AlGaAs (110) quantum wells

AU - Morita, K.

AU - Sanada, H.

AU - Matsuzaka, S.

AU - Hu, C. Y.

AU - Ohno, Y.

AU - Ohno, H.

N1 - Funding Information: The authors wish to acknowledge K. Ohtani, M. Kohda for useful discussions. This work was partly supported by Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan Society for the Promotion of Science (JSPS), and 21st Century COE program “System Construction of Global-Network Oriented Information Electronics,” at Tohoku University.

PY - 2005/10/24

Y1 - 2005/10/24

N2 - Anisotropic spin dynamics of two-dimensional electrons in strained n-InGaAsAlGaAs (110) quantum wells (QWs) is investigated by a time-resolved Faraday rotation technique. Strong anisotropy of the relaxation time for the electron spins in parallel (τ∥) and perpendicular (τ⊥) to the QWs is observed (τ⊥ τ∥ ∼60) at 150 K as a result of the enhanced D'yakonov-Perel' (DP) spin relaxation mechanism. At 5 K, an anisotropic feature of the spin relaxation time is also observed in the presence of in-plane magnetic field, suggesting that the DP mechanism is effective for low-temperature spin relaxation.

AB - Anisotropic spin dynamics of two-dimensional electrons in strained n-InGaAsAlGaAs (110) quantum wells (QWs) is investigated by a time-resolved Faraday rotation technique. Strong anisotropy of the relaxation time for the electron spins in parallel (τ∥) and perpendicular (τ⊥) to the QWs is observed (τ⊥ τ∥ ∼60) at 150 K as a result of the enhanced D'yakonov-Perel' (DP) spin relaxation mechanism. At 5 K, an anisotropic feature of the spin relaxation time is also observed in the presence of in-plane magnetic field, suggesting that the DP mechanism is effective for low-temperature spin relaxation.

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