Noise‐induced current oscillations in superlattices: from stationary to moving domains

Schöll, Eckehard; Hizanidis, Johanne; Balanov, Alexander; Amann, Andreas

doi:doi:10.1063/1.2730006

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AIP Conference Proceedings / Volume 893

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Noise‐induced current oscillations in superlattices: from stationary to moving domains

AIP Conf. Proc. 893, pp. 543-544; doi:http://dx.doi.org/10.1063/1.2730006 (2 pages)

PHYSICS OF SEMICONDUCTORS: 28th International Conference on the Physics of Semiconductors - ICPS 2006

Date: 24-28 July 2006

Location: Vienna (Austria)

Eckehard Schöll¹, Johanne Hizanidis¹, Alexander Balanov^1,2, and Andreas Amann^1,3

¹Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstraße 36, 10623 Berlin, Germany
²School of Physics and Astronomy, University of Nottingham, UK
³Tyndall National Institute, Lee Maltings, Cork, Ireland

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Abstract

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We provide a detailed understanding of the transition between stationary and moving domains in semiconductor superlattices. We show that it corresponds to a global bifurcation (saddle‐node infinite period bifurcation on a limit cycle or SNIPER). The dynamics close to such a bifurcation is moreover very sensitive to noise. We show that front motion, and hence current oscillations, can be induced by shot noise of the tunneling processes even if the deterministic system exhibits a stable stationary field domain. © 2007 American Institute of Physics