Coupled electron-nuclear spin dynamics in quantum dots: A graded box model approach

M. Yu. Petrov, G. G. Kozlov, I. V. Ignatiev, R. V. Cherbunin, D. R. Yakovlev, M. Bayer

Research output

20 Citations (Scopus)

Abstract

The dynamics of electron and nuclear spin polarization in an ensemble of singly negatively charged quantum dots subject to optical excitation is theoretically studied using a graded box model, in which the electron density is approximated by a sequence of steps. The model is numerically implemented for a limited number of nuclei up to N=192 with spins I=1/2 or I=3/2. The polarization dynamics is found to depend strongly on the polarized excitation protocol. For excitation by periodic laser pulses, the electron-nuclear spin dynamics evolves coherently and gives rise to a recurrence effect in the electron spin dynamics as well as to a decelerated nuclear polarization. The validity of the model is justified by comparison with experimental data on the electron spin polarization in In,GaAs/GaAs quantum dots.
Original languageUndefined
Pages (from-to)125318_1-6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number12
DOIs
Publication statusPublished - 2009

Cite this

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title = "Coupled electron-nuclear spin dynamics in quantum dots: A graded box model approach",
abstract = "The dynamics of electron and nuclear spin polarization in an ensemble of singly negatively charged quantum dots subject to optical excitation is theoretically studied using a graded box model, in which the electron density is approximated by a sequence of steps. The model is numerically implemented for a limited number of nuclei up to N=192 with spins I=1/2 or I=3/2. The polarization dynamics is found to depend strongly on the polarized excitation protocol. For excitation by periodic laser pulses, the electron-nuclear spin dynamics evolves coherently and gives rise to a recurrence effect in the electron spin dynamics as well as to a decelerated nuclear polarization. The validity of the model is justified by comparison with experimental data on the electron spin polarization in In,GaAs/GaAs quantum dots.",
author = "Petrov, {M. Yu.} and Kozlov, {G. G.} and Ignatiev, {I. V.} and Cherbunin, {R. V.} and Yakovlev, {D. R.} and M. Bayer",
year = "2009",
doi = "10.1103/PhysRevB.80.125318",
language = "не определен",
volume = "80",
pages = "125318_1--6",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "12",

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TY - JOUR

T1 - Coupled electron-nuclear spin dynamics in quantum dots: A graded box model approach

AU - Petrov, M. Yu.

AU - Kozlov, G. G.

AU - Ignatiev, I. V.

AU - Cherbunin, R. V.

AU - Yakovlev, D. R.

AU - Bayer, M.

PY - 2009

Y1 - 2009

N2 - The dynamics of electron and nuclear spin polarization in an ensemble of singly negatively charged quantum dots subject to optical excitation is theoretically studied using a graded box model, in which the electron density is approximated by a sequence of steps. The model is numerically implemented for a limited number of nuclei up to N=192 with spins I=1/2 or I=3/2. The polarization dynamics is found to depend strongly on the polarized excitation protocol. For excitation by periodic laser pulses, the electron-nuclear spin dynamics evolves coherently and gives rise to a recurrence effect in the electron spin dynamics as well as to a decelerated nuclear polarization. The validity of the model is justified by comparison with experimental data on the electron spin polarization in In,GaAs/GaAs quantum dots.

AB - The dynamics of electron and nuclear spin polarization in an ensemble of singly negatively charged quantum dots subject to optical excitation is theoretically studied using a graded box model, in which the electron density is approximated by a sequence of steps. The model is numerically implemented for a limited number of nuclei up to N=192 with spins I=1/2 or I=3/2. The polarization dynamics is found to depend strongly on the polarized excitation protocol. For excitation by periodic laser pulses, the electron-nuclear spin dynamics evolves coherently and gives rise to a recurrence effect in the electron spin dynamics as well as to a decelerated nuclear polarization. The validity of the model is justified by comparison with experimental data on the electron spin polarization in In,GaAs/GaAs quantum dots.

U2 - 10.1103/PhysRevB.80.125318

DO - 10.1103/PhysRevB.80.125318

M3 - статья

VL - 80

SP - 125318_1-6

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 12

ER -