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High-electric-field current–voltage characteristics and low-frequency oscillations in a low-dislocation-density semi-insulating GaAs

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3 Author(s)
Kiyama, M. ; Semiconductor R&D Laboratories, Sumitomo Electric Industries, 1-1-1 Koya-kita, Itami, Hyogo 664-0016, Japan ; Tatsumi, M. ; Yamada, M.

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High-electric-field current–voltage (I–V) characteristics and low-frequency oscillations (LFO) have been measured in a low-dislocation-density semi-insulating GaAs. At the electrodes where several dislocations exist, the sublinear I–V behavior is weaker and more scattered, and the onset voltage of LFO is lower and its waveform is more complicated than those at the electrodes where no dislocations exist. The high-electric-field properties are discussed by the electrical inhomogeneities induced by the dislocations.

Published in:

Journal of Applied Physics  (Volume:97 ,  Issue: 11 )