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

MS Skolnick, DM Whittaker, PE Simmonds, TA Fisher, MK Saker, JM Rorison, RS Smith, PB Kirby, CRH White

Research output: Contribution to journalArticle (Academic Journal)peer-review

52 Citations (Scopus)

Abstract

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
Translated title of the contributionFermi-energy-edge singularity in quantum wells containing more than one occupied subband
Original languageEnglish
Pages (from-to)7354 - 7357
Number of pages4
JournalPhysical Review B: Condensed Matter
Volume43 (9)
DOIs
Publication statusPublished - Mar 1991

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