Hysteretic dynamic nuclear polarization in GaAs/AlxGa1−xAs (110) quantum wells

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

doi:10.1103/PhysRevB.68.241303

Hysteretic dynamic nuclear polarization in GaAs/Al_xGa_1−xAs (110) quantum wells

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

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Abstract

We investigated the dynamics of a coupled electron-nuclear spin system in a GaAs/AlGaAs (110) quantum well by time-resolved Faraday rotation measurements. Photoexcited electron spins with long coherence time (T₂^* = 6 ns) are strongly subject to a nuclear field as well as polarizing the nuclei. A hysteretic behavior was observed in the magnetic-field dependence of the nuclear polarization under optical orientation. Our quantitative analysis based on self-consistent calculations reproduced the experimental observation of the bistable configurations of dynamic nuclear polarization.

Original language	English
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	68
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevB.68.241303
Publication status	Published - 2003 Dec 15

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.68.241303

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abstract = "We investigated the dynamics of a coupled electron-nuclear spin system in a GaAs/AlGaAs (110) quantum well by time-resolved Faraday rotation measurements. Photoexcited electron spins with long coherence time (T2* = 6 ns) are strongly subject to a nuclear field as well as polarizing the nuclei. A hysteretic behavior was observed in the magnetic-field dependence of the nuclear polarization under optical orientation. Our quantitative analysis based on self-consistent calculations reproduced the experimental observation of the bistable configurations of dynamic nuclear polarization.",

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AU - Sanada, H.

AU - Matsuzaka, S.

AU - Morita, K.

AU - Hu, C. Y.

AU - Ohno, Y.

AU - Ohno, H.

PY - 2003/12/15

Y1 - 2003/12/15

N2 - We investigated the dynamics of a coupled electron-nuclear spin system in a GaAs/AlGaAs (110) quantum well by time-resolved Faraday rotation measurements. Photoexcited electron spins with long coherence time (T2* = 6 ns) are strongly subject to a nuclear field as well as polarizing the nuclei. A hysteretic behavior was observed in the magnetic-field dependence of the nuclear polarization under optical orientation. Our quantitative analysis based on self-consistent calculations reproduced the experimental observation of the bistable configurations of dynamic nuclear polarization.

AB - We investigated the dynamics of a coupled electron-nuclear spin system in a GaAs/AlGaAs (110) quantum well by time-resolved Faraday rotation measurements. Photoexcited electron spins with long coherence time (T2* = 6 ns) are strongly subject to a nuclear field as well as polarizing the nuclei. A hysteretic behavior was observed in the magnetic-field dependence of the nuclear polarization under optical orientation. Our quantitative analysis based on self-consistent calculations reproduced the experimental observation of the bistable configurations of dynamic nuclear polarization.

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Hysteretic dynamic nuclear polarization in GaAs/Al_xGa_1−xAs (110) quantum wells

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