Effects of Dissipation and Noise on Chaotic Transport in Superlattices

A.G. Balanov, M.T. Greenaway, T.M. Fromhold
2009 Acta Physica Polonica. A  
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
more » ... vel, 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 fatcat:cjmdsdwjm5f6pht4lugqr3d23y