Quantum oscillations of the current in an electron-hole condensate in germaniun
Gantmakher V. F., Zverev V.N.
Using laser radiation to produce a high photocarrier density in germanium, we succeeded in observing quantum oscillations of the photocurrent as a function of the magnetic field. The presence of such oscillations confirms the existence of a two-phase system, namely an electron-hole condensate with exciton "vapor" . The oscillations are apparently due to the heavy holes. Their period in terms of the reciprocal field determines the carrier density N in the condensate and the Fermi energies Ee and En of the electrons and holes.