Spin–orbit (SO) magnetic fields caused by the Dresselhaus SO interaction in slightly misoriented (110) InGaAs/InAlAs quantum wells (QWs) are investigated using the time-resolved and spatially resolved optical Kerr rotation technique. The Dresselhaus SO magnetic field is directed along the in-plane in the (001) QWs and along the out-of-plane in the (110) QWs. On the contrary, in QWs grown on a slightly misoriented (110) substrate, the out-of-plane and in-plane components of the Dresselhaus SO magnetic field coexist. In this study, the strong out-of-plane and the in-plane SO magnetic fields peculiar to the misoriented (110) InGaAs QWs are revealed at room temperature by analyzing spatially resolved diffusion-driven spin precession dynamics with a diagonally applied external magnetic field. Based on the scan position dependence of the spin precession frequency induced by the SO magnetic field, the simultaneous observations of the out-of-plane and the in-plane SO magnetic fields are achieved and Dresselhaus SO parameter is extracted to be eV m. This value accounts for the scan position dependencies with various magnetic fields and reveals the reliability of the extracted SO parameter.
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19 July 2021
Research Article|
July 19 2021
Room-temperature spin–orbit magnetic fields in slightly misoriented (110) InGaAs/InAlAs multiple quantum wells
Koichi Nakanishi;
Koichi Nakanishi
1
Graduate School of Electrical and Electronic Engineering, Chiba University
, Chiba 263-8522, Japan
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Ayuki Arikawa;
Ayuki Arikawa
1
Graduate School of Electrical and Electronic Engineering, Chiba University
, Chiba 263-8522, Japan
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Yasuhito Saito;
Yasuhito Saito
1
Graduate School of Electrical and Electronic Engineering, Chiba University
, Chiba 263-8522, Japan
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Daisuke Iizasa;
Daisuke Iizasa
2
Department of Materials Science, Tohoku University
, Sendai 980-8579, Japan
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Satoshi Iba
;
Satoshi Iba
3
Spintronics Research Center, National Institute of Advanced Industrial Science and Technology
, Tsukuba, Ibaraki 305-8568, Japan
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Yuzo Ohno;
Yuzo Ohno
4
Graduate School of Pure and Applied Sciences, University of Tsukuba
, Tsukuba 305-8573, Japan
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Nobuhide Yokota;
Nobuhide Yokota
5
Research Institute of Electrical Communication, Tohoku University
, Sendai 980-8577, Japan
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Makoto Kohda;
Makoto Kohda
2
Department of Materials Science, Tohoku University
, Sendai 980-8579, Japan
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Yoshihiro Ishitani
;
Yoshihiro Ishitani
1
Graduate School of Electrical and Electronic Engineering, Chiba University
, Chiba 263-8522, Japan
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Ken Morita
Ken Morita
a)
1
Graduate School of Electrical and Electronic Engineering, Chiba University
, Chiba 263-8522, Japan
a)Author to whom correspondence should be addressed: morita@chiba-u.jp. Tel./Fax: +81-43-290-3360
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a)Author to whom correspondence should be addressed: morita@chiba-u.jp. Tel./Fax: +81-43-290-3360
Appl. Phys. Lett. 119, 032405 (2021)
Article history
Received:
May 04 2021
Accepted:
July 02 2021
Citation
Koichi Nakanishi, Ayuki Arikawa, Yasuhito Saito, Daisuke Iizasa, Satoshi Iba, Yuzo Ohno, Nobuhide Yokota, Makoto Kohda, Yoshihiro Ishitani, Ken Morita; Room-temperature spin–orbit magnetic fields in slightly misoriented (110) InGaAs/InAlAs multiple quantum wells. Appl. Phys. Lett. 19 July 2021; 119 (3): 032405. https://doi.org/10.1063/5.0055876
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