Dynamics of the nuclear spin polarization by optically oriented electrons in a (In,Ga)As/GaAs quantum dot ensemble

R.V. Cherbunin, S.Yu. Verbin, T. Auer, D.R. Yakovlev, I.V. Ignatiev, M. Bayer, I.Ya. Gerlovin, D.V. Vishnevsky, D. Reuter, A.D. Wieck

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29 Citations (Scopus)

Abstract

The nuclear spin dynamics in an ensemble of singly charged (In,Ga)As/GaAs quantum dots has been studied at a temperature of 1.6 K. The effective magnetic field of nuclear polarization was detected through the circular polarization of quantum dot photoluminescence. The polarization is reduced if an external magnetic field compensates the nuclear field. To study the time evolution of the nuclear field, a photoluminescence pump-probe technique has been developed, from which we find a complex behavior of the nuclear-polarization dynamics; its rise is considerably slowed down when the effective field of polarized nuclei exceeds that of the nuclear spin fluctuations. A phenomenological model for the dynamics of a strongly coupled electron-nuclear spin system has been developed, whose results qualitatively agree with the experimental data.
Original languageUndefined
Pages (from-to)035326_1-8
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number3
DOIs
Publication statusPublished - 2009

Cite this

@article{4e51ed5baca14be5918525adb69d784c,
title = "Dynamics of the nuclear spin polarization by optically oriented electrons in a (In,Ga)As/GaAs quantum dot ensemble",
abstract = "The nuclear spin dynamics in an ensemble of singly charged (In,Ga)As/GaAs quantum dots has been studied at a temperature of 1.6 K. The effective magnetic field of nuclear polarization was detected through the circular polarization of quantum dot photoluminescence. The polarization is reduced if an external magnetic field compensates the nuclear field. To study the time evolution of the nuclear field, a photoluminescence pump-probe technique has been developed, from which we find a complex behavior of the nuclear-polarization dynamics; its rise is considerably slowed down when the effective field of polarized nuclei exceeds that of the nuclear spin fluctuations. A phenomenological model for the dynamics of a strongly coupled electron-nuclear spin system has been developed, whose results qualitatively agree with the experimental data.",
author = "R.V. Cherbunin and S.Yu. Verbin and T. Auer and D.R. Yakovlev and I.V. Ignatiev and M. Bayer and I.Ya. Gerlovin and D.V. Vishnevsky and D. Reuter and A.D. Wieck",
year = "2009",
doi = "DOI: 10.1103/PhysRevB.80.035326",
language = "не определен",
volume = "80",
pages = "035326_1--8",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "3",

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TY - JOUR

T1 - Dynamics of the nuclear spin polarization by optically oriented electrons in a (In,Ga)As/GaAs quantum dot ensemble

AU - Cherbunin, R.V.

AU - Verbin, S.Yu.

AU - Auer, T.

AU - Yakovlev, D.R.

AU - Ignatiev, I.V.

AU - Bayer, M.

AU - Gerlovin, I.Ya.

AU - Vishnevsky, D.V.

AU - Reuter, D.

AU - Wieck, A.D.

PY - 2009

Y1 - 2009

N2 - The nuclear spin dynamics in an ensemble of singly charged (In,Ga)As/GaAs quantum dots has been studied at a temperature of 1.6 K. The effective magnetic field of nuclear polarization was detected through the circular polarization of quantum dot photoluminescence. The polarization is reduced if an external magnetic field compensates the nuclear field. To study the time evolution of the nuclear field, a photoluminescence pump-probe technique has been developed, from which we find a complex behavior of the nuclear-polarization dynamics; its rise is considerably slowed down when the effective field of polarized nuclei exceeds that of the nuclear spin fluctuations. A phenomenological model for the dynamics of a strongly coupled electron-nuclear spin system has been developed, whose results qualitatively agree with the experimental data.

AB - The nuclear spin dynamics in an ensemble of singly charged (In,Ga)As/GaAs quantum dots has been studied at a temperature of 1.6 K. The effective magnetic field of nuclear polarization was detected through the circular polarization of quantum dot photoluminescence. The polarization is reduced if an external magnetic field compensates the nuclear field. To study the time evolution of the nuclear field, a photoluminescence pump-probe technique has been developed, from which we find a complex behavior of the nuclear-polarization dynamics; its rise is considerably slowed down when the effective field of polarized nuclei exceeds that of the nuclear spin fluctuations. A phenomenological model for the dynamics of a strongly coupled electron-nuclear spin system has been developed, whose results qualitatively agree with the experimental data.

U2 - DOI: 10.1103/PhysRevB.80.035326

DO - DOI: 10.1103/PhysRevB.80.035326

M3 - статья

VL - 80

SP - 035326_1-8

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 3

ER -