Magneto-optical probing of weak disorder in a two-dimensional hole gas

Abstract

In two-beam magneto-photoluminescence spectra of a two-dimensional valence hole gas we identify the three-level energy spectrum of a free positive trion with a field-induced singlet-triplet transition. The recombination spectrum of acceptor-bound trions is also detected, including a cyclotron replica corresponding to the hole shake-up process. The emergence of a shake-up peak at low temperature is shown to be a sensitive probe of the presence of a small number of impurities inside the high-mobility quantum well, and its relative position is directly related to the hole cyclotron mass.

4 pages, 5 figures

References in corpus (6)

• Charged exctions in the fractional quantum Hall regime
• Magnetic field dependence of the energy of negatively charged excitons in semiconductor quantum wells
• Definitive observation of the dark triplet ground state of charged excitons in high magnetic fields
• Positively charged magneto-excitons in a semiconductor quantum well
• Quasiexcitons in Incompressible Quantum Liquids
• Shake-up Processes in a Low-Density Two-Dimensional Electron Gas: Spin-Dependent Transitions to Higher Hole Landau Levels

Cited by in corpus (4)

• Optically driving the radiative Auger transition
• Nature and Control of Shakeup Processes in Colloidal Nanoplatelets
• Cyclotron-resonant exciton transfer between the nearly free and strongly localized radiative states of a two-dimensional hole gas in a high magnetic field
• Dispersion laws of the two-dimensional cavity magnetoexciton-polaritons