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Manifestation of exitonic effects in the magneto-oscillations of the intensity of the recombination radiation of 2D electrons
Authors:O. V. Volkov  V. E. Zhitomirskii  I. V. Kukushkin  K. von Klitzing  K. Eberl
Affiliation:(1) Institute of Solid-State Physics, Russian Academy of Sciences, 142432 Chernogolovka, Moscow District, Russia;(2) Max-Planck-Institut für Feskorperforschung, 70569 Stuttgart, Germany
Abstract:A study is made of the temperature dependence of the magnetooscillations of the recombination radiation of 2D electrons from the photoexcited size-quantization subband in an isolated GaAs/AlGaAs quantum well. It is shown that at high temperatures (T>10 K) the period of the oscillations is determined by the ratio of the intersubband energy splitting and the sum of the electron and hole cyclotron energies. It is found that as the temperature decreases (T<5 K), a new series of oscillations (with the same period but with a larger phase shift), which are associated with the appearance of excitonic states under the Landau levels, appears. Pis’ma Zh. éksp. Teor. Fiz. 64, No. 10, 719–724 (25 November 1996)
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