Spiking in an activator-inhibitor model for elements with S-shaped negative differential conductivity |
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Authors: | A. Wacker E. Schöll |
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Affiliation: | (1) Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstrasse 36, D-10623 Berlin, Germany |
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Abstract: | Self-organized spatio-temporal dynamics of electrical transport is described by a simple noncubic activator-inhibitor system derived for layered semiconductor structures. The model exhibits a novel mode of self-sustained oscillations due to current filaments switching on and off (spiking) which may be periodic or chaotic. Additionally, we obtain complex multifilamentary spatio-temporal patterns. As such phenomena have been observed in various devices exhibiting S-shaped negative differential conductivity, our model is suggested to describe a generic mechanism. |
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Keywords: | 72.20.Ht 73.40.Kp 05.45.+b |
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