Magnetotransmission Measurements of Intra-Shallow-Donor Transitions in Semi-Insulating GaAs
K. Karpierz, K. Kożuchowski and M. Grynberg
Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warszawa, Poland
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In this paper we present the results of an investigation of the 1s-2p+ intra-shallow-donor transition by means of an extremely difficult magnetotransmission experiment performed on semi-insulating GaAs. We report the temperature dependence of the transition intensity. We noticed the absence in the absorbance spectra of a well-pronounced structure which is observed at low magnetic fields in photoconductivity measurements. The results are discussed in terms of a fluctuating potential from ionized centres in semi-insulating GaAs.
DOI: 10.12693/APhysPolA.82.617
PACS numbers: 72.40.+w, 78.20.Ls, 78.50.Ge