THE DYNAMICS AND HYSTERESIS IN GaAs/AlGaAs HETEROSTRUCTURE UNDER THE ACTION OF ELECTRIC AND MAGNETIC FIELDS

Abstract

We theoretically studied current oscillations and the dynamics of the modulation-doped GaAs/AlGaAs heterostructure under the action of electric fields and a perpendicular magnetic field. The results show that the current oscillations and hysteresis in the system can be found under the DC bias voltage. Under the effect of the increasing magnetic fields, the oscillations will disappear and the width of the hysteresis is broader. Considering the AC part, the system shows interesting nonlinear behaviors like the route of an inverse period-doubling to chaos, quasiperiodicity, and frequency-locking.

Time-delayed feedback control of chaos in a GaAs/AlGaAs heterostructure

“…The nonlinear transport of a modulation-doped GaAs/ Al x Ga 1 x As under a transverse magnetic field and an ac electric field is described by a set of differential equations that can be found in Ref. [17]. In this section, we give a brief introduction to the model.…”