Abstract
Changes in the binding energy and oscillator strength of an exciton state due to screening by a quasi-two-dimensional electron gas were calculated self-consistently in a nonlinear approximation. It was shown that the collapse of the bound state proceeds at very small concentrations N s ≃5×109 cm−2, which is a consequence of taking into account the nonlinearity of the system response to the Coulomb perturbation.
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Translated from Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 74, No. 2, 2001, pp. 123–126.
Original Russian Text Copyright © 2001 by Kulakovski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\), Gubarev, Lozovik.
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Kulakovskii, D.V., Gubarev, S.I. & Lozovik, Y.E. Screening of exciton states by quasi-two-dimensional electron gas in quantum wells. Jetp Lett. 74, 118–121 (2001). https://doi.org/10.1134/1.1405899
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DOI: https://doi.org/10.1134/1.1405899