Coherent magneto-optical activity in a single chiral carbon nanotube

Slavcheva, G; Roussignol, Philippe

doi:10.1007/978-3-642-12491-4_8

Cited by 2 publications

(1 citation statement)

References 46 publications

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“…The carrier spin dynamics in low-dimensional semiconductor structures has attracted considerable interest because of the possibilities of spin storage and manipulation in future semiconductor electro-optic devices and quantum information processing. [1][2][3] This is because the confined carrier spins are relatively well decoupled from the orbital and charge degrees of freedom and the spin coherence is not obstructed by the commonly noted charge decoherence mechanisms. 4) For the potential spin-based applications, a complete understanding of the fundamental spin interactions in the localization volume is crucial because the spin interactions may limit the application performance by inducing the spin decoherence.…”

Section: Introductionmentioning

confidence: 99%

Direct evaluation of nuclear spin fluctuation by using nuclear spin switch in single quantum structures

Kaji¹,

Matsusaki²,

Yamamoto³

et al. 2019

Jpn. J. Appl. Phys.

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The nuclear spin fluctuation (NSF) induces a severe electron spin relaxation and is one of the hot issues for various spin-based applications. In this study, we demonstrate the convenient method for the direct evaluation of the NSF by utilizing the nuclear spin switch in single In0.75Al0.25As/Al0.3Ga0.7As quantum dots and InAs/GaAs quantum rings. Our method uses the photoluminescence signals with time-integrated mode and can be utilized in the individual nanostructures with weak signal intensities. Further, the demonstrated method can be used to determine the sign and magnitude of electron and hole effective g factors, which are the key parameters describing the dynamics of a coupled electron-nuclear spin system.

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Section: Introductionmentioning

confidence: 99%

Direct evaluation of nuclear spin fluctuation by using nuclear spin switch in single quantum structures

Kaji¹,

Matsusaki²,

Yamamoto³

et al. 2019

Jpn. J. Appl. Phys.

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Influence of a Longitudinal Field on the Large In‐Plane Nuclear Field Formation in Single Quantum Dots

Yamamoto

Arakawa

Matsusaki

et al. 2019

Physica Status Solidi (b)

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Experimental studies on the role of nuclear quadrupole interaction (NQI) to the in-plane nuclear field formation are performed in single self-assembled In 0.75 Al 0.25 As= Al 0.3 Ga 0.7 As quantum dots (QDs). In Hanle-effect measurements, the electron depolarization curves deviating far from a standard Lorentzian shape are observed: the curves with anomalously large width and hysteretic behavior at the critical transverse magnetic field. These anomalies indicate the growth of an in-plane nuclear field compensating the applied transverse magnetic field up to %1 T and appear regardless of the excitation helicity. The azimuth angle dependence of the critical field of the hysteretic response reveals that the principal axis of the NQI is almost parallel to the crystal growth axis. This fact suggests that the main origin of the NQI which is related with in-plane nuclearfield formation is not random alloying among In and Al nuclei but residual strain of QDs. Furthermore, a longitudinal magnetic field by a neodymium magnet breaks the excitation-helicity independence of the Hanle curves and the shape of curves becomes very different depending on the helicity. The obtained results are explained well with a simple consideration and indicate that the NQI takes multirole in the formation of in-plane nuclear field.

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Coherent magneto-optical activity in a single chiral carbon nanotube

Cited by 2 publications

References 46 publications

Direct evaluation of nuclear spin fluctuation by using nuclear spin switch in single quantum structures

Direct evaluation of nuclear spin fluctuation by using nuclear spin switch in single quantum structures

Influence of a Longitudinal Field on the Large In‐Plane Nuclear Field Formation in Single Quantum Dots

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