Zeitschrift für Physik B Condensed Matter

, Volume 93, Issue 4, pp 431–436 | Cite as

Spiking in an activator-inhibitor model for elements with S-shaped negative differential conductivity

  • A. Wacker
  • E. Schöll
Original Contributions


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.


72.20.Ht 73.40.Kp 05.45.+b 


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Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • A. Wacker
    • 1
  • E. Schöll
    • 1
  1. 1.Institut für Theoretische PhysikTechnische Universität BerlinBerlinGermany

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