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Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field

Optical and electrical control of the nuclear spin system allows enhancing the sensitivity of NMR applications and spin-based information storage and processing. Dynamic nuclear polarization in semiconductors is commonly achieved in the presence of a stabilizing external magnetic field. Here we repo...

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Autores principales: Sallen, G., Kunz, S., Amand, T., Bouet, L., Kuroda, T., Mano, T., Paget, D., Krebs, O., Marie, X., Sakoda, K., Urbaszek, B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Pub. Group 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3926008/
https://www.ncbi.nlm.nih.gov/pubmed/24500329
http://dx.doi.org/10.1038/ncomms4268
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author Sallen, G.
Kunz, S.
Amand, T.
Bouet, L.
Kuroda, T.
Mano, T.
Paget, D.
Krebs, O.
Marie, X.
Sakoda, K.
Urbaszek, B.
author_facet Sallen, G.
Kunz, S.
Amand, T.
Bouet, L.
Kuroda, T.
Mano, T.
Paget, D.
Krebs, O.
Marie, X.
Sakoda, K.
Urbaszek, B.
author_sort Sallen, G.
collection PubMed
description Optical and electrical control of the nuclear spin system allows enhancing the sensitivity of NMR applications and spin-based information storage and processing. Dynamic nuclear polarization in semiconductors is commonly achieved in the presence of a stabilizing external magnetic field. Here we report efficient optical pumping of nuclear spins at zero magnetic field in strain-free GaAs quantum dots. The strong interaction of a single, optically injected electron spin with the nuclear spins acts as a stabilizing, effective magnetic field (Knight field) on the nuclei. We optically tune the Knight field amplitude and direction. In combination with a small transverse magnetic field, we are able to control the longitudinal and transverse components of the nuclear spin polarization in the absence of lattice strain—that is, in dots with strongly reduced static nuclear quadrupole effects, as reproduced by our model calculations.
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spelling pubmed-39260082014-02-21 Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field Sallen, G. Kunz, S. Amand, T. Bouet, L. Kuroda, T. Mano, T. Paget, D. Krebs, O. Marie, X. Sakoda, K. Urbaszek, B. Nat Commun Article Optical and electrical control of the nuclear spin system allows enhancing the sensitivity of NMR applications and spin-based information storage and processing. Dynamic nuclear polarization in semiconductors is commonly achieved in the presence of a stabilizing external magnetic field. Here we report efficient optical pumping of nuclear spins at zero magnetic field in strain-free GaAs quantum dots. The strong interaction of a single, optically injected electron spin with the nuclear spins acts as a stabilizing, effective magnetic field (Knight field) on the nuclei. We optically tune the Knight field amplitude and direction. In combination with a small transverse magnetic field, we are able to control the longitudinal and transverse components of the nuclear spin polarization in the absence of lattice strain—that is, in dots with strongly reduced static nuclear quadrupole effects, as reproduced by our model calculations. Nature Pub. Group 2014-02-06 /pmc/articles/PMC3926008/ /pubmed/24500329 http://dx.doi.org/10.1038/ncomms4268 Text en Copyright © 2014, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/
spellingShingle Article
Sallen, G.
Kunz, S.
Amand, T.
Bouet, L.
Kuroda, T.
Mano, T.
Paget, D.
Krebs, O.
Marie, X.
Sakoda, K.
Urbaszek, B.
Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field
title Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field
title_full Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field
title_fullStr Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field
title_full_unstemmed Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field
title_short Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field
title_sort nuclear magnetization in gallium arsenide quantum dots at zero magnetic field
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3926008/
https://www.ncbi.nlm.nih.gov/pubmed/24500329
http://dx.doi.org/10.1038/ncomms4268
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