We have observed luminescence lines from "hot" free excitons and from recombination of "hot" electrons within electron-hole droplets in Ge under uniform $〈111〉$ uniaxial stress. Our results suggest that both "hot" and "cold" electrons coexist in the same electron-hole droplets. We have also measured the total lifetime of the hot electrons, which is in good agreement with intervalley relaxation by electron-electron scattering.

• Received 19 July 1977

DOI:https://doi.org/10.1103/PhysRevLett.39.959