Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/111526
Title: Dynamic Polarization of Electron Spins Interacting with Nuclei in Semiconductor Nanostructures
Authors: Smirnov, D. S.
Shamirzaev, T. S.
Yakovlev, D. R.
Bayer, M.
Issue Date: 2020
Publisher: American Physical Society
American Physical Society (APS)
Citation: Dynamic Polarization of Electron Spins Interacting with Nuclei in Semiconductor Nanostructures / D. S. Smirnov, T. S. Shamirzaev, D. R. Yakovlev et al. // Physical Review Letters. — 2020. — Vol. 125. — Iss. 15. — 156801.
Abstract: We suggest a new spin orientation mechanism for localized electrons: Dynamic electron spin polarization provided by nuclear spin fluctuations. The detrimental effect of nuclear spin fluctuations can be harnessed and employed to provide angular momentum for the electrons via the hyperfine interaction in a weak magnetic field. For this, the sample is illuminated by an unpolarized light, which directly polarizes neither the electrons nor the nuclei. We predict that, for the electrons bound in localized excitons, 100% spin polarization can be reached in longitudinal magnetic fields of a few millitesla. The proof of principle experiment is performed on momentum-indirect excitons in (In,Al)As/AlAs quantum dots, where in a magnetic field of 17 mT the electron spin polarization of 30% is measured. © 2020 American Physical Society.
Keywords: ELECTROSPINNING
EXCITONS
MAGNETIC FIELDS
MAGNETIC MOMENTS
SEMICONDUCTOR QUANTUM DOTS
SPIN FLUCTUATIONS
SPIN POLARIZATION
DYNAMIC POLARIZATION
ELECTRON SPIN POLARIZATION
HYPERFINE INTERACTIONS
LOCALIZED ELECTRONS
LONGITUDINAL MAGNETIC FIELDS
PROOF-OF-PRINCIPLE EXPERIMENTS
SEMICONDUCTOR NANOSTRUCTURES
WEAK MAGNETIC FIELDS
ELECTRONS
URI: http://hdl.handle.net/10995/111526
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85093363975
PURE ID: 14159185
ISSN: 0031-9007
metadata.dc.description.sponsorship: We thank E. L. Ivchenko with M. M. Glazov for fruitful discussions, J. Rautert with D. Kudlacik for technical support, RF President Grant No. MK-1576.2019.2, and the Foundation for the Advancement of Theoretical Physics and Mathematics “BASIS.” This work was supported by the Deutsche Forschungsgemeinschaft via the Project No. 409810106 and by the Russian Foundation for Basic Research Grant No. 19-52-12001. T. S. S. acknowledges the financial support by the Russian Foundation for Basic Research (Grant No. 19-02-00098) and by the Act 211 Government of the Russian Federation (Contract No. 02.A03.21.0006). Government of the Russian Federation also supports this work via Grant No. AAAA-A17-117042110141-5. The theoretical studies by D. S. S. were supported by the Russian Science Foundation (Grant No. 19-72-00081). M. B. acknowledges support by the Deutsche Forschungsgemeinschaft (TRR 160, project A1).
RSCF project card: 19-72-00081
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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