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VOLUME 30 (1979) | ISSUE 8 | PAGE 499
Existence of bi-excitons and trions in germanium
The photoluminescence of germanium has been investigated near the exciton condensation threshold at a temperature of 2-5.2 K, for uniaxial compression and in the presence of an electric field. It is shown that the broadening of the long-wavelength exciton band edge is not due to the formation of molecular-type states.