Nonlinear current density in a compositional semiconductor superlattice under crossed electric and magnetic fields
Abstract
The dc electrical transport in a compositional semiconductor superlattice subjected to a crossed electric field and magnetic field, is studied theoretically. The electron - optical phonon interaction is taken into account at high temperature and strong magnetic field. We obtain the expression for nonlinear current density involving external (electric and magnetic) fields and characteristic parameters of the superlattice. The analytical result is numerically evaluating and graphed for GaAs/Al0.3Ga0.7As superlattice. The intra- and inter-subband magnetophonon resonance effect is observed when the dc electric field is absent. Resonance peaks shift to higher cyclotron energy region when the dc electric field is switched on. The current density increases linearly with small value region and nonlinearly with large value region of the dc electric field.References
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