Current Instability in Germanium due to Excitation of the Recombination Waves

Abstract Spontaneous current oscillations were observed in n‐type germanium containing manganese. The latter was compensated with antimony so that the upper level E c −0.37 eV was only partly filled with electrons. The spontaneous current oscillations were observed at room temperature or near it, and for an electric field strength of several tenths of V/cm. The oscillation frequency was in the range of 0.1 to 1 MHz. The relative amplitude of the current oscillations reached 50 to 90%. As was shown by the probe measurements, the instability was a bulk phenomenon and contact effects were not essential. It was proved that this phenomenon might be interpreted in terms of excitation of the recombination waves predicted in [1].

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