Magnetotunneling spectroscopy in wide In0.53Ga0.47As/In0.52Al0.48As double quantum wells

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Abstract
Magnetoquantum oscillations in the tunnel current of wide In0.53Ga0.47As/In0.52Al0.48As double quantum wells have been exploited to trace the energy levels in the adjacent wells as a function of the applied voltage. The dominant inelastic scattering mechanism was identified as GaAs‐like longitudinal‐optical‐phonon emission. This powerful spectroscopy probe allows an unambiguous identification of the transmission channels responsible for the peaks observed in the current‐voltage characteristics and provides a large number of consistency checks. The obtained experimental results can be used to verify the accuracy of self‐consistent simulation programs.