Ionization of the Direct-Gap Exciton in Photoexcited Germanium
- 22 August 1983
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 51 (8) , 698-701
- https://doi.org/10.1103/physrevlett.51.698
Abstract
The excitonic absorption at the direct gap in Ge is measured as a function of the density and temperature of excitations at the indirect gap. The spectra are analyzed by means of a many-body theory which is valid for arbitrary free-carrier densities. The critical densities for the ionization are determined for temperatures from 8.5 to 60 K and compared with other predictions.Keywords
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