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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Wacker, A., Schöll, E. Spiking in an activator-inhibitor model for elements with S-shaped negative differential conductivity. Z. Physik B - Condensed Matter 93, 431–436 (1994). https://doi.org/10.1007/BF01314246
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DOI: https://doi.org/10.1007/BF01314246