1. Parameter dependence of high-frequency nonlinear oscillations and intrinsic chaos in short GaAs/(Al, Ga)As superlattices
- Author
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Jonathan Essen, Manuel Carretero, Luis L. Bonilla, Ian Jenkins, Miguel Ruiz-Garcia, and Björn Birnir
- Subjects
Physics ,Condensed Matter - Mesoscale and Nanoscale Physics ,Condensed matter physics ,Applied Mathematics ,Superlattice ,Chaotic ,FOS: Physical sciences ,General Physics and Astronomy ,Statistical and Nonlinear Physics ,02 engineering and technology ,Codimension ,Parameter space ,Conductivity ,021001 nanoscience & nanotechnology ,01 natural sciences ,Gallium arsenide ,chemistry.chemical_compound ,chemistry ,Mesoscale and Nanoscale Physics (cond-mat.mes-hall) ,0103 physical sciences ,Nonlinear Oscillations ,010306 general physics ,0210 nano-technology ,Mathematical Physics ,Quantum tunnelling - Abstract
We explore the design parameter space of short (5--25 period), n-doped, Ga/(Al,Ga)As semiconductor superlattices (SSLs) in the sequential resonant tunneling regime. We consider SSLs at cool (77K) and warm (295K) temperatures, simulating the electronic response to variations in (a) the number of SSL periods, (b) the contact conductivity, and (c) the strength of disorder (aperiodicities). Our analysis shows that the chaotic dynamical phases exist on a number of sub-manifolds of codimension zero within the design parameter space. This result provides an encouraging guide towards the experimental observation of high-frequency intrinsic dynamical chaos in shorter SSLs., 18 pages, 6 figures
- Published
- 2020