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Chaos supported stochastic resonance in a metal-ferroelectric-semiconductor heterostructure

B. Mereu1, C. P. Cristescu2, and M. Alexe1

  • 1Max Planck Institute of Microstructure Physics, Weinberg 2, D-06120, Halle, Germany
  • 2Department of Physics, Politehnica University of Bucharest, RO-060042, Roumania

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Phys. Rev. E 71, 047201 – Published 4 April, 2005

DOI: https://doi.org/10.1103/PhysRevE.71.047201

Abstract

An experimental study is presented on a complex nonlinear system showing a particular type of dynamics that can be interpreted as stochastic resonance. The system consists of a metal-ferroelectric-semiconductor structure, which plays the role of a nonlinear element in an electric circuit with linear resistance, inductance, and capacitance connected in series (RLC series circuit) driven externally by a high-amplitude harmonic voltage source. The system presents various kinds of nonlinear behavior, of which the simplest, consisting of a period-doubling evolution to chaos, is of interest to this study. The broadband intrinsic chaos emerging after a period-doubling sequence exists for a large range of frequencies of the driving voltage. The appearance of the chaotic dynamics is associated with the promotion of a low-frequency harmonic spectral component. This is interpreted as stochastic resonance with intrinsic chaos replacing noise, the usual variable in regular SR.

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Phys. Rev. E 71, 047201– Published 4 April, 2005
  • Received 22 October 2004

© 2005 American Physical Society

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