Rashba spin-orbit coupling probed by the weak antilocalization analysis in InAlAs/InGaAs/InAlAs quantum wells as a function of quantum well asymmetry

Takaaki Koga; Junsaku Nitta; Tatsushi Akazaki; Hideaki Takayanagi

doi:10.1103/PhysRevLett.89.046801

Rashba spin-orbit coupling probed by the weak antilocalization analysis in InAlAs/InGaAs/InAlAs quantum wells as a function of quantum well asymmetry

Takaaki Koga, Junsaku Nitta, Tatsushi Akazaki, Hideaki Takayanagi

Research output: Contribution to journal › Article › peer-review

443 Citations (Scopus)

Abstract

The values of the Rashba spin-orbit coupling constant α for MOCVD-grown In_0.52Al_0.48As/In_0.53Ga_0.47As/- In_0.52Al_0.48As quantum wells were studied using weak antilocalization analysis as a function of the structural inversion asymmetry (SIA) of the quantum well (QW). A clear transition from positive to negative magnetoresistance near B=0 T was observed by changing the SIA of the QWs. Furthermore, a quantitative agreement was found between theoretical and experimental values of α as a function of both the SIA and/or the sheet carrier density of the QWs.

Original language	English
Article number	046801
Pages (from-to)	046801/1-046801/4
Journal	Physical Review Letters
Volume	89
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.89.046801
Publication status	Published - 2002 Jul 22
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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abstract = "The values of the Rashba spin-orbit coupling constant α for MOCVD-grown In0.52Al0.48As/In0.53Ga0.47As/- In0.52Al0.48As quantum wells were studied using weak antilocalization analysis as a function of the structural inversion asymmetry (SIA) of the quantum well (QW). A clear transition from positive to negative magnetoresistance near B=0 T was observed by changing the SIA of the QWs. Furthermore, a quantitative agreement was found between theoretical and experimental values of α as a function of both the SIA and/or the sheet carrier density of the QWs.",

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AU - Akazaki, Tatsushi

AU - Takayanagi, Hideaki

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AB - The values of the Rashba spin-orbit coupling constant α for MOCVD-grown In0.52Al0.48As/In0.53Ga0.47As/- In0.52Al0.48As quantum wells were studied using weak antilocalization analysis as a function of the structural inversion asymmetry (SIA) of the quantum well (QW). A clear transition from positive to negative magnetoresistance near B=0 T was observed by changing the SIA of the QWs. Furthermore, a quantitative agreement was found between theoretical and experimental values of α as a function of both the SIA and/or the sheet carrier density of the QWs.

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Rashba spin-orbit coupling probed by the weak antilocalization analysis in InAlAs/InGaAs/InAlAs quantum wells as a function of quantum well asymmetry

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