Dynamics of Nuclear Polarization in InGaAs Quantum Dots in a Transverse Magnetic Field

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Abstract

The time-resolved Hanle effect is examined for negatively charged InGaAs/GaAs quantum dots. Experimental data are analyzed by using an original approach to separate behavior of the longitudinal and transverse components of nuclear polarization. This made it possible to determine the rise and decay times of each component of nuclear polarization and their dependence on transverse magnetic field strength. The rise and decay times of the longitudinal component of nuclear polarization (parallel to the applied field) were found to be almost equal (approximately 5 ms). An analysis of the transverse component of nuclear polarization shows that the corresponding rise and decay times differ widely and strongly depend on magnetic field strength, increasing from a few to tens of milliseconds with an applied field between 20 and 100 mT. Current phenomenological models fail to explain the observed behavior of nuclear polarization. To find an explanation, an adequate theory of spin dynamics should be developed for the nucl
Original languageEnglish
Pages (from-to)681-690
JournalJournal of Experimental and Theoretical Physics
Volume114
Issue number4
DOIs
Publication statusPublished - 2012

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quantum dots
polarization
magnetic fields
field strength
decay
spin dynamics

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title = "Dynamics of Nuclear Polarization in InGaAs Quantum Dots in a Transverse Magnetic Field",
abstract = "The time-resolved Hanle effect is examined for negatively charged InGaAs/GaAs quantum dots. Experimental data are analyzed by using an original approach to separate behavior of the longitudinal and transverse components of nuclear polarization. This made it possible to determine the rise and decay times of each component of nuclear polarization and their dependence on transverse magnetic field strength. The rise and decay times of the longitudinal component of nuclear polarization (parallel to the applied field) were found to be almost equal (approximately 5 ms). An analysis of the transverse component of nuclear polarization shows that the corresponding rise and decay times differ widely and strongly depend on magnetic field strength, increasing from a few to tens of milliseconds with an applied field between 20 and 100 mT. Current phenomenological models fail to explain the observed behavior of nuclear polarization. To find an explanation, an adequate theory of spin dynamics should be developed for the nucl",
author = "S.Yu. Verbin and I.Ya. Gerlovin and I.V. Ignatiev and M.S. Kuznetsova and R.V. Cherbunin and K. Flisinski and D. Yakovlev and M. Bayer",
year = "2012",
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TY - JOUR

T1 - Dynamics of Nuclear Polarization in InGaAs Quantum Dots in a Transverse Magnetic Field

AU - Verbin, S.Yu.

AU - Gerlovin, I.Ya.

AU - Ignatiev, I.V.

AU - Kuznetsova, M.S.

AU - Cherbunin, R.V.

AU - Flisinski, K.

AU - Yakovlev, D.

AU - Bayer, M.

PY - 2012

Y1 - 2012

N2 - The time-resolved Hanle effect is examined for negatively charged InGaAs/GaAs quantum dots. Experimental data are analyzed by using an original approach to separate behavior of the longitudinal and transverse components of nuclear polarization. This made it possible to determine the rise and decay times of each component of nuclear polarization and their dependence on transverse magnetic field strength. The rise and decay times of the longitudinal component of nuclear polarization (parallel to the applied field) were found to be almost equal (approximately 5 ms). An analysis of the transverse component of nuclear polarization shows that the corresponding rise and decay times differ widely and strongly depend on magnetic field strength, increasing from a few to tens of milliseconds with an applied field between 20 and 100 mT. Current phenomenological models fail to explain the observed behavior of nuclear polarization. To find an explanation, an adequate theory of spin dynamics should be developed for the nucl

AB - The time-resolved Hanle effect is examined for negatively charged InGaAs/GaAs quantum dots. Experimental data are analyzed by using an original approach to separate behavior of the longitudinal and transverse components of nuclear polarization. This made it possible to determine the rise and decay times of each component of nuclear polarization and their dependence on transverse magnetic field strength. The rise and decay times of the longitudinal component of nuclear polarization (parallel to the applied field) were found to be almost equal (approximately 5 ms). An analysis of the transverse component of nuclear polarization shows that the corresponding rise and decay times differ widely and strongly depend on magnetic field strength, increasing from a few to tens of milliseconds with an applied field between 20 and 100 mT. Current phenomenological models fail to explain the observed behavior of nuclear polarization. To find an explanation, an adequate theory of spin dynamics should be developed for the nucl

U2 - DOI: 10.1134/S1063776112040176

DO - DOI: 10.1134/S1063776112040176

M3 - Article

VL - 114

SP - 681

EP - 690

JO - Journal of Experimental and Theoretical Physics

JF - Journal of Experimental and Theoretical Physics

SN - 1063-7761

IS - 4

ER -