The effect of barrier width on the electronic properties of double GaAlAs/GaAs and GaInAs/GaAs quantum wells

In this study, the electronic properties of symmetric and asymmetric double Ga1-xAlxAs/GaAs and Ga1-xInxAs/GaAs quantum wells have been investigated depending on the barrier width. Using the effective mass approach, the energy levels and wave functions of double quantum wells (DQW) have been calculated by solving the Schrödinger equation. Our results show that the potential height and the energy levels of Ga1-xInxAs/GaAs DQW are always higher than of Ga1-xAlxAs/GaAs DQW structure. Also, for Ga1-xInxAs/GaAs DQW the variation of the energy difference between these levels as dependent on the barrier width is more than for Ga1-xAlxAs/GaAs DQW. We say that the barrier width have a great effect on the electronic characteristics of different symmetric and asymmetric DQW structures.