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

Abstract

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.