PT Journal
AU Gershenzon, EM
   Gol'tsman, GN
   Ptitsina, NG
TI Investigation of free excitons in Ge and their condensation at submillimeter wavelengths
SO Sov. Phys. JETP
JI Sov. Phys. JETP
PY 1976
BP 116
EP 122
VL 43
IS 1
DE Ge; free excitons
AB Results are presented of an investigation of free excitons in Ge in the submillimeter wavelength range for low as well as for high excitation levels when interaction between the excitons becomes important. The free-exciton energy spectrum is discussed. It is shown that the drop radii and their concentrations can be determined by measuring the temperature dependence of the free-exciton concentration. A section of the phase diagram is obtained in the 0.5-2.8 K temperature range for the free excitons+condensate system.
ER