Effects of Dissipation and Noise on Chaotic Transport in Superlattices
A.G. Balanova,b,c, M.T. Greenawayc and T.M. Fromholdc
a Department of Physics, Loughborough University, Loughborough LE11 3TU, UK
b Faculty of Nonlinear Processes, Saratov State University, Astrakhanskaya, 83, Saratov, 410012, Russia
c School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, UK
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We study the effects of dissipation and noise on chaotic electron dynamics, which accompany charge transport in semiconductor superlattices with an applied bias voltage and a tilted magnetic field. We consider the evolution of different chaotic trajectories as decoherence increases, and show that below a critical level of the dissipation rate, dissipative chaos plays an important role in the electron transport. However, by increasing the dissipation rate above the critical level, chaotic dynamics disappear and electrons only demonstrate regular motion. We also investigate how the presence of random fluctuations affects magnetotransport in superlattices and reveal a counter intuitive non monotonic dependence of electron drift velocity upon the noise intensity.
DOI: 10.12693/APhysPolA.116.733
PACS numbers: 73.21.Cd, 72.20.Ht, 05.45.-a