Abstract
Large‐amplitude excess noise has been observed in the tunneling current of degenerate p‐type GaAs–Au Schottky junctions. At 4.2 K the noise voltage exhibits well‐defined peaks as a function of bias voltage. The background noise exhibits a 1/f‐type spectral response, but the spectral response of some of the peaks indicates that tunneling via surface states with a single average lifetime occurs. Peaks in the noise voltage correspond in bias voltage position with structure in d2I/dV2.

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