Accelerated, decelerated, and oscillating fronts in a globally coupled bistable semiconductor system

M. Meixner, P. Rodin, and E. Schöll
Phys. Rev. E 58, 2796 – Published 1 September 1998
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Abstract

We study front propagation in a globally coupled bistable semiconductor system. The analysis is based on an activator-inhibitor model derived for a gate-driven pnpn structure that is globally coupled via a gate-cathode circuit, but the model is applicable for more general cases of a spatially extended system with Z-shaped bistability. We demonstrate that a global constraint allows for efficient control over the front propagation. In the voltage-driven regime the front propagates with a constant speed whose value and direction are controlled by the gate potential. Under general gate circuit conditions the front dynamics experiences either a positive or a negative feedback which acts with adjustable delay. This allows for tuning between accelerated, decelerated, and oscillating fronts.

  • Received 31 March 1998

DOI:https://doi.org/10.1103/PhysRevE.58.2796

©1998 American Physical Society

Authors & Affiliations

M. Meixner, P. Rodin*, and E. Schöll

  • Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstrasse 36, D-10623 Berlin, Germany

  • *On leave from A. F. Ioffe Physicotechnical Institute, Russian Academy of Science, 194021 St. Petersburg, Russia.

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Vol. 58, Iss. 3 — September 1998

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