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Title: An anomaly of the current self-oscillation frequency in the sequential tunneling of a doped GAAS/AlAs superlattice
Authors: Wang, Xiang-Rong
Wang, Jiannong
Sun, Bao-Quan
Jiang, D. S.
Keywords: Current self-oscillation frequency
Dynamic dc voltage bands
GaAs/AlAs superlattice
Issue Date: Mar-2000
Citation: Physical review. B, Condensed matter and materials physics, v. 61, no. 11, March 2000, p. 7261-7264
Abstract: An anomalous behavior of the current self-oscillation frequency is observed in the dynamic dc voltage bands, emerging from each sawtooth-like branch of the current-voltage characteristic of a doped GaAs/AlAs superlattice in the transition process from static to dynamic electric field domain formations. Varying the applied dc voltage at a fixed temperature, we find that the frequency increases while the averaged current decreases. Inside each voltage band, the frequency has a strong voltage dependence in the temperature range where the averaged current changes with the applied dc voltage. This dependence can be understood in terms of motion of the system along a limit cycle.
Rights: Physical Review B - Condensed Matter and Materials Physics © copyright 2000 American Physical Society. The Journal's web site is located at
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