Current oscillation and chaotic dynamics in superlattices driven by crossed electric and magnetic fields.
We have theoretically studied current oscillation and chaotic dynamics in doped GaAsAlAs superlattices driven by crossed electric and magnetic fields. When the superlattice system is driven by a dc voltage, a stationary or dynamic electric-field domain can be obtained. We carefully studied the electric-field-domain dynamics and current self-oscillation which both display different modes with the change of magnetic field. When an ac electric field is also applied to the superlattice, a typical nonlinear dynamic system is constructed with the ac amplitude, ac frequency, and magnetic field as the control parameters. Different nonlinear behaviors show up when we tune the control parameters.
Wang
C
C
State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, P. R. China.
Cao
J C
JC
D004574:Electromagnetic Fields; D008280:Magnetics; D015233:Models, Statistical; D017711:Nonlinear Dynamics; D009991:Oscillometry; D010825:Physics / Q000379:methods; D013997:Time Factors