
Fermi edge singularity evidence from photoluminescence spectroscopy of AlGaAs/InGaAs/GaAs pseudomorphic HEMTs grown on (3Â 1Â 1)A GaAs substrates
Keywords: P-HEMT; AlxGa1âxAs/InyGa1âyAs/GaAs; GaAs(311)A substrate; Photoluminescence; Fermi edge singularity; Two-dimensional electron gas;