Ap. Abramov et al., PHOTOLUMINESCENCE OF A DEGENERATE ELECTRON-GAS IN GAAS-SI FILMS GROWNBY THE METHOD OF MOLECULAR-BEAM EPITAXY, Semiconductors, 27(7), 1993, pp. 647-649
The photoluminescence spectra of Si-doped epitaxial GaAs films with a
wide range of free carrier densities 10(16)-7.8X10(18) cm-3 were studi
ed at T=4.2 K. The observed asymmetric luminescence band is attributed
to the recombination of a degenerate electron ps with localized photo
holes. The properties of the electron gas in such heavily doped epitax
ial GaAs films were found to be governed not so much by the nature of
the dopant as by the conditions during growth.