Publication Details

This article was originally published as: Skolnick, MS, Whittaker, DM, Simmonds, PE, et al, Fermi-energy-edge singularity in quantum wells containing more than one occupied subband, Physical Review B, 1991, 43(9), 7354-7357. Copyright 1991 American Physical Society. The original journal can be found here.


A study of the Fermi-energy-edge singularity in asymmetric modulation-doped quantum wells is reported. It is shown that high densities of free carriers in filled n=1 electron subbands have no significant influence on the edge singularity in partly occupied n=2 subbands, demonstrating the weakness of intersubband Coulomb-scattering processes. The enhancement of oscillator strength at the Fermi energy is of very similar magnitude to that for excitonic transitions in undoped quantum wells.

Included in

Engineering Commons



Link to publisher version (DOI)