Many-body and disorder effects in the optical spectra of extremely high density Be δ-doped GaAs

Academic Article


  • We study the highly degenerate hole gas found in extremely high density Be δ-doped GaAs (ns≈1014cm-2). Sharp excitonic-like features (Fermi-edge singularities), dominate the luminescence spectrum at low temperatures and remarkably coexist with a high degree of disorder evidenced by large, temperature independent Urbach tails and low mobilities. This observation coincides with a transition to self-organized clustered Be growth and the population of additional hole subbands. Copyright © 1996 Published by Elsevier Science Ltd.
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    Digital Object Identifier (doi)

    Author List

  • Fritze M; Kastalsky A; Cunningham JE; Knox WH; Pathak RN; Perakis IE
  • Start Page

  • 497
  • End Page

  • 501
  • Volume

  • 100
  • Issue

  • 7