Regensburg 2019 – scientific programme
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DY: Fachverband Dynamik und Statistische Physik
DY 31: Nonlinear Dynamics, Synchronization and Chaos
DY 31.3: Talk
Wednesday, April 3, 2019, 10:30–10:45, H20
Memory induced slow-fast chaotic dynamics in a Chua circuit — •Tom Birkoben1, Moritz Drangmeister2, Finn Zahari1, Serhiy Yanchuk3, Philipp Hövel4, and Hermann Kohlstedt1 — 1Nanoelektronik, Faculty of Engineering, Kiel University, Kiel, Germany — 2Institute of Theoretical Physics, TU Berlin, Berlin, Germany — 3Institute of Mathematics, TU Berlin, Berlin, Germany — 4School of Mathematical Sciences, University College Cork, Cork, Ireland
Chaotic signatures have been observed in a wide range of different non-linear systems. Besides the famous Lorenz-equations, which resemble atmospheric convections, the Chua circuit is another prominent representative of chaotic systems. This nonlinear electrical circuit consists of three energy-storing passive elements and a locally active resistor. The circuit allows the experimental study of chaotic phenomena within a mathematically well-described and dynamically rich environment. Here we present experimental and theoretical results on the Chua circuit compromising a memristive double barrier device. The device consists of Nb/Al/Al2O3/NbxOy/Au layers, is forming free and has a typical Roff/Ron ratio of about 100 at 0.7 V. The memory element changes the dynamics of the original system and induces transient suppressions of the intrinsic chaotic oscillations. The analysis of the extended system reveals overall slow-fast oscillations and their cause in the varying memristance.