Comparison of magneto-optical transport properties due to piezoelectric phonon scattering in rectangular, parabolic, and semiparabolic GaAs-based quantum wells

Abstract

The magneto-optical transport characteristics resulting from the electron-piezoelectric-phonon (e-piezoelectric-p) interaction in two-dimensional systems with various confinement potentials, including parabolic, rectangular, and semi-parabolic quantum wells (QWs), are thoroughly studied and compared as the magnetic field is present by applying the technique of operator projection. The results revealed that the powers of the magneto-optical absorption resulting from the interaction of the e-piezoelectric-p in the three types of QWs not only are functions of the energy of an incident photon but also are strongly influenced by the parameters of material, structure, and external field. The result also indicates that the interaction strength of the e-piezoelectric-p in three types of QWs rises with a rising applied magnetic field, confined potential frequency (for parabolic and semi-parabolic QWs), and quantum-system temperature; conversely, it diminishes with a rising electron density in material and well-width (for rectangular QW). Especially, the resulting outcome demonstrates that the strength of the e-piezoelectric-p interaction in the rectangular well is the strongest; inversely, the interaction strength is the weakest in the semi-parabolic QW among the three types of QWs. This indicates that the magneto-optical property of the rectangular potential Q2D system is the most dominant among the three above confinement potentials.