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Limit cycle theory of self-sustained current oscillations in sequential tunneling of superlattices

Authors Sun, ZZ HKUST affiliated (currently or previously)
Wang, SD
Duan, SQ
Wang, XR View this author's profile
Issue Date 2005
Source Superlattices and microstructures , v. 38, (2), 2005, AUG, p. 142-150
Summary A unified theory of self-sustained current oscillations (SSCOs) is presented. We establish these oscillations as the manifestations of limit cycles, around unstable steady-state solutions caused by the negative differential conductance. This theory implies that both the generation and the motion of an electric field domain boundary are universal in the sense that they do not depend on the initial conditions. Under an extra, weak ac bias with a frequency omega(ac), the frequency must be either coat or an integer fractional of coat if the tunneling current oscillates periodically in time, indicating the periodic doubling for this nonlinear dynamical system. (C) 2005 Elsevier Ltd. All rights reserved.
ISSN 0749-6036
Rights Superlattices and Microstructures © 2005 Elsevier. The Journal's web site is located at
Language English
Format Article
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