Magnetic Oscillation of Luminescence Energy in Asymmetric Quantum Wells

Abstract

Magnetic-field dependence of luminescence energy due to recombination of a two-dimensional electron and a photogenerated free hole in one-side-doped n-type GaAs/AlGaAs single quantum wells is calculated. The luminescence energy shows an anomalous shift when the Fermi energy is in an energy gap between adjacent Landau levels. The direction of this energy shift depends on the well width. This is due to well-width dependence of screening strength of two-dimensional electron gas for holes.