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" [1]. 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.
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![](/ps/1808/article_27632_800_head.png "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" [1]. 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 E<sub>e</sub> and E<sub>n</sub> of the electrons and holes.")