Abstract:
We present a comparative study of the influence of the form of a localization potential on the binding energy of the biexciton in spherically symmetric quantum dots based on II–VI compounds. The proposed criterion for the comparison of potentials of different forms–the box potential, the harmonic oscillator, and the Gaussian potential–is based on the identical localization of charge carriers of the same sign in these potentials. Calculations of the biexciton binding energy have been performed using the variational method within the framework of the kp-perturbation theory taking into account additional polarization terms in the wave functions of the electron and hole subsystems, as well as the complex structure of the valence band. The obtained results have demonstrated that the presence of a smoothly varying finite-height potential in Cd(Zn)Se/ZnSe quantum dots can lead to a more efficient localization in the case of the biexciton in comparison with the exciton, which is of interest for the implementation of fast-acting quantum light emitters.
Citation:
A. A. Golovatenko, M.A. Semina, A. V. Rodina, T. V. Shubina, “Biexciton in II–VI quantum dots with different localization potentials”, Fizika Tverdogo Tela, 59:6 (2017), 1192–1200; Phys. Solid State, 59:6 (2017), 1215–1224
\Bibitem{GolSemRod17}
\by A.~A.~Golovatenko, M.A.~Semina, A.~V.~Rodina, T.~V.~Shubina
\paper Biexciton in II--VI quantum dots with different localization potentials
\jour Fizika Tverdogo Tela
\yr 2017
\vol 59
\issue 6
\pages 1192--1200
\mathnet{http://mi.mathnet.ru/ftt9559}
\crossref{https://doi.org/10.21883/FTT.2017.06.44492.433}
\elib{https://elibrary.ru/item.asp?id=29405127}
\transl
\jour Phys. Solid State
\yr 2017
\vol 59
\issue 6
\pages 1215--1224
\crossref{https://doi.org/10.1134/S1063783417060099}
Linking options:
https://www.mathnet.ru/eng/ftt9559
https://www.mathnet.ru/eng/ftt/v59/i6/p1192
This publication is cited in the following 3 articles:
S. V. Andreev, “Spin-orbit-coupled depairing of a dipolar biexciton superfluid”, Phys. Rev. B, 103:18 (2021)
A. A. Golovatenko, M.A. Semina, A. V. Rodina, T. V. Shubina, “Excitons and biexcitons in spheroidal quantum dots А2B6”, Phys. Solid State, 60:8 (2018), 1510–1513
A. A. Golovatenko, M.A. Semina, A. V. Rodina, T. V. Shubina, “Biexciton binding energy in spherical quantum dots with Γ8 valence band”, Semiconductors, 52:5 (2018), 554–557
Citation in format AMSBIB
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