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Title: An external ac bias induced expansion of dynamic voltage bands in a weakly coupled GaAs/AlAs superlattice
Authors: He, H. T.
Sun, Zhouzhou
Wang, Xiang-Rong
Wang, Y. Q.
Ge, Wei-Kun
Wang, Jiannong
Keywords: Dynamic voltage bands
AC induced expansion
Issue Date: Jul-2004
Citation: Presented at the 27th International Conference on the Physics of Semiconductors, July 26-30, 2004. (Flagstaff, Arizona)
Abstract: In intermediate temperature region, an ac induced expansion of dynamic voltage band (DVB) is observed in a weakly coupled GaAs/AlAs supperlattice. An analysis in nonlinear terminology suggests that the effect of an external ac signal is to tighten the unstable limit cycle onto the stable fixed point. Beyond certain critical value, the stable limit cycle is the only stable solution of this system.
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