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Carrier spin dynamics in GaAs/AlGaAs quantum wells with a laterally localizing electric potential

  • Low-Dimensional Systems and Surface Physics
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Abstract

The spin orientation dynamics in a GaAs quantum well with a laterally nonuniform electric potential generated by a mosaic electrode deposited on the surface of the sample has been investigated using the photoinduced magneto-optical Kerr effect. It has been found that the application of a negative potential higher than 1 V to the electrode leads to more than a hundredfold increase in the spin polarization lifetime in the sample under study. It is concluded that so strong slowing down of the relaxation is caused by a combined action of two effects, namely, the spatial separation of electron and hole, which reduces the radiative recombination rate of electron-hole pair, and the localization of electron, which is accompanied by the suppression of spin relaxation processes caused by electron motion.

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Authors and Affiliations

  1. St. Petersburg State University, Ul’yanovskaya ul. 3, Staryĭ Peterhof, St. Petersburg, 198504, Russia

    R. V. Cherbunin, M. S. Kuznetsova, I. Ya. Gerlovin, I. V. Ignatiev, Yu. K. Dolgikh, Yu. P. Efimov, S. A. Eliseev, V. V. Petrov & S. V. Poltavtsev

  2. Institute of Solid State Physics, Russian Academy of Sciences, Institutskaya ul. 2, Chernogolovka, Moscow Region, 142432, Russia

    A. V. Larionov

  3. Institute of Microelectronics Technology Problems and High Purity Materials, Russian Academy of Sciences, Institutskaya ul. 6, Chernogolovka, Moscow Region, 142432, Russia

    A. I. Il’in

Authors
  1. R. V. Cherbunin
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  2. M. S. Kuznetsova
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  3. I. Ya. Gerlovin
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  4. I. V. Ignatiev
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  5. Yu. K. Dolgikh
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  6. Yu. P. Efimov
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  7. S. A. Eliseev
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  8. V. V. Petrov
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  9. S. V. Poltavtsev
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  10. A. V. Larionov
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  11. A. I. Il’in
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Corresponding author

Correspondence to I. V. Ignatiev.

Additional information

Original Russian Text © R.V. Cherbunin, M.S. Kuznetsova, I.Ya. Gerlovin, I.V. Ignatiev, Yu.K. Dolgikh, Yu.P. Efimov, S.A. Eliseev, V.V. Petrov, S.V. Poltavtsev, A.V. Larionov, A.I. Il’in, 2009, published in Fizika Tverdogo Tela, 2009, Vol. 51, No. 4, pp. 791–794.

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Cherbunin, R.V., Kuznetsova, M.S., Gerlovin, I.Y. et al. Carrier spin dynamics in GaAs/AlGaAs quantum wells with a laterally localizing electric potential. Phys. Solid State 51, 837–840 (2009). https://doi.org/10.1134/S1063783409040349

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  • DOI: https://doi.org/10.1134/S1063783409040349

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