Emission of electron-hole drops in germanium at 0.5K
Galkina T.I. , Milyaev V.A., Mikhailova G.N., Penin N.A.
We have investigated the radiative recombination of electron-hole (e-h) drops in pure Ge at 1.3 0.5°K, for the purpose of constructing the phase diagram of an electron-hole liquid and a free-exciton gas at 0.5°K. The threshold concentration of the excitons at which the e-h drops are produced at O.S°K is estimated at < 3 χ 1012 cm-3. No new emission lines (e.g., exciton-molecule lines) were observed. The broadening of the e-h drop emission lines is attributed to the influence of deformations in the region of the condensation nuclei.