Space group symmetry of the conduction band minimum in very short period   superlattices

Ge, Weikun; Schmidt, W.; Sturge, M. D.; Pfeiffer, L. N.; West, K. W.

doi:10.1016/0038-1098(92)90726-p

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“…In previous investigations of the optical properties of short-period GaAs/AlAs SL's, several phonon replicas were observed in photoluminescence ͑PL͒ experiments for layer thicknesses below 10 ML. [3][4][5][6][7][8][9][10][11][12][13] However, no detailed investigation of the intensity of the phonon replicas on the layer thickness has been performed, to our knowledge.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of electron-phonon interaction in ultrashort-period GaAs/AlAs superlattices

et al. 1997

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The interaction of electrons and phonons is strongly enhanced in ultrashort-period GaAs/AlAs superlattices. The enhancement is caused by an increase of the exciton binding energy with decreasing superlattice period. The photoluminescence spectra of indirect-gap superlattices exhibit a zero-phonon line due to scattering by defects and/or interfacial roughness as well as pronounced phonon sidebands. ͓S0163-1829͑97͒07015-X͔

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