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Fermi-energy-edge singularity in quantum wells containing more than one occupied subband

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posted on 2024-11-15, 22:16 authored by M S Skolnick, D M Whittaker, Philip Simmonds, T A Fisher, M K Saker, J M Rorison, R S Smith, P B Kirby, C R White
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.

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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.

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English

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