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We explore the design parameter space of short (5--25 period), n-doped,Ga/(Al,Ga)As semiconductor superlattices (SSLs) in the sequential resonanttunneling regime. We consider SSLs at cool (77K) and warm (295K) temperatures,simulating the electronic response to variations in (a) the number of SSLperiods, (b) the contact conductivity, and (c) the strength of disorder(aperiodicities). Our analysis shows that the chaotic dynamical phases exist ona number of sub-manifolds of codimension zero within the design parameterspace. This result provides an encouraging guide towards the experimentalobservation of high-frequency intrinsic dynamical chaos in shorter SSLs.

Parameter dependence of high-frequency nonlinear oscillations and intrinsic chaos in short GaAs/(Al,Ga)As superlattices