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Self-stabilization of chaotic domain oscillations in superlattices by time-delayed feedback control

J Schlesner1, A Amann1, N Janson1,2, W Just1,3 and E Schöll1

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Semiconductor superlattices driven into the regime of negative differential conductivity often exhibit complex or even chaotic self-sustained current oscillations due to travelling field domains. For a reliable operation of a superlattice as an electronic oscillator, such unpredictable and irregular conditions should be avoided. In this work we present a theoretical analysis, proposing a novel scheme to stabilize high-frequency domain oscillations in semiconductor superlattices by a time-delayed feedback loop.


PACS

73.21.Cd Superlattices

84.30.Ng Oscillators, pulse generators, and function generators

73.63.-b Electronic transport in nanoscale materials and structures

Subjects

Electronics and devices

Surfaces, interfaces and thin films

Nanoscale science and low-D systems

Dates

Issue 4 (April 2004)

Received 28 July 2003

Published 27 February 2004



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