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Investigation of the effects of spin injection of charge carriers from a ferromagnetic Ni(Co)/GaAs Schottky contact in quantum well heterostructures

  • Proceedings of the International Symposium “Nanophysics and Nanoelectronics-2007”
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Bulletin of the Russian Academy of Sciences: Physics Aims and scope

Abstract

The circularly polarized electroluminescence of quantum-confined InGaAs/GaAs heterostructures with a ferromagnetic Ni(Co)/GaAs Schottky contact has been investigated. It is shown that the high degree of circular polarization (to 42%) is due to the injection of spin-polarized holes from the ferromagnetic metal. The dependence of the spin injection efficiency on the type of the metal/GaAs interface and the quantum well depth has been analyzed. The spin coherence length of holes was found to be ≈80 nm at 1.5 K.

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Authors and Affiliations

  1. Physico-Technical Research Institute, Nizhni Novgorod State University, Nizhni Novgorod, 603600, Russia

    M. V. Dorokhin, N. V. Baidus’, Yu. A. Danilov, P. B. Demina, B. N. Zvonkov & E. A. Uskova

  2. Institute of Solid-State Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432, Russia

    S. V. Zaitsev & V. D. Kulakovskii

Authors
  1. M. V. Dorokhin
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  2. S. V. Zaitsev
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  3. N. V. Baidus’
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  4. Yu. A. Danilov
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  5. P. B. Demina
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  6. B. N. Zvonkov
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  7. V. D. Kulakovskii
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  8. E. A. Uskova
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Corresponding author

Correspondence to M. V. Dorokhin.

Additional information

Original Russian Text © M.V. Dorokhin, S.V. Zaitsev, N.V. Baidus’, Yu.A. Danilov, P.B. Demina, B.N. Zvonkov, V.D. Kulakovskii, E.A. Uskova, 2008, published in Izvestiya Rossiiskoi Akademii Nauk. Seriya Fizicheskaya, 2008, Vol. 72, No. 2, pp. 180–183.

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Dorokhin, M.V., Zaitsev, S.V., Baidus’, N.V. et al. Investigation of the effects of spin injection of charge carriers from a ferromagnetic Ni(Co)/GaAs Schottky contact in quantum well heterostructures. Bull. Russ. Acad. Sci. Phys. 72, 163–166 (2008). https://doi.org/10.3103/S106287380802007X

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  • DOI: https://doi.org/10.3103/S106287380802007X

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