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Pis'ma v Zh. Èksper. Teoret. Fiz., 2012, Volume 96, Issue 9, Pages 635–640 (Mi jetpl3270)  

This article is cited in 8 scientific papers (total in 8 papers)


Optical orientation of nuclei in nitrogen alloys GaAsN at room temperature

V. K. Kalevichab, M. M. Afanas'evba, A. Yu. Shiryaeva, A. Yu. Egorova

a Ioffe Physico-Technical Institute, Russian Academy of Sciences
b Saint-Petersburg State University

Abstract: The intensity and giant circular polarization of edge luminescence in a longitudinal magnetic field have been measured in nitrogen alloys GaAsN under circularly polarized pumping. It has been found that these dependences are shifted with respect to zero field by a value $B_{\textrm{eff}}$. The magnitude of the internal field $B_{\textrm{eff}}$ increases with the pumping intensity and reaches saturation ($\approx250$ G) at large excitation densities. The saturation of the B eff field with growth of pumping indicates that this is a field of nuclei, polarized dynamically due to hyperfine interaction with optically oriented deep paramagnetic centers, rather than a field of exchange interaction created on the center by spin-polarized photo-excited conduction electrons. The short time of nuclear polarization by electrons ($<15 \mu$s), measured under modulation of circular polarization of the exciting light with high frequency, points to a small number of nuclei undergoing hyperfine interaction with an electron localized at a center.

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English version:
Journal of Experimental and Theoretical Physics Letters, 2012, 96:9, 567–571

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Document Type: Article
Received: 10.09.2012

Citation: V. K. Kalevich, M. M. Afanas'ev, A. Yu. Shiryaev, A. Yu. Egorov, “Optical orientation of nuclei in nitrogen alloys GaAsN at room temperature”, Pis'ma v Zh. Èksper. Teoret. Fiz., 96:9 (2012), 635–640; JETP Letters, 96:9 (2012), 567–571

Citation in format AMSBIB
\by V.~K.~Kalevich, M.~M.~Afanas'ev, A.~Yu.~Shiryaev, A.~Yu.~Egorov
\paper Optical orientation of nuclei in nitrogen alloys GaAsN at room temperature
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2012
\vol 96
\issue 9
\pages 635--640
\jour JETP Letters
\yr 2012
\vol 96
\issue 9
\pages 567--571

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    2. Sandoval-Santana C., Balocchi A., Amand T., Harmand J.C., Kunold A., Marie X., “Room-Temperature Optical Manipulation of Nuclear Spin Polarization in Gaasn”, Phys. Rev. B, 90:11 (2014), 115205  crossref  adsnasa  isi  elib  scopus
    3. Ivchenko E.L. Bakaleinikov L.A. Kalevich V.K., “Spin-Dependent Recombination and Hyperfine Interaction At Deep Defects”, Phys. Rev. B, 91:20 (2015), 205202  crossref  adsnasa  isi  elib  scopus
    4. Ivchenko E.L., Bakaleinikov L.A., Afanasiev M.M., Kalevich V.K., “Spin-dependent recombination in GaAs$_{1-x}$N$_{x}$ alloys at oblique magnetic field”, Phys. Solid State, 58:8 (2016), 1539–1548  crossref  isi  elib  scopus
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