Electronic properties of semimagnetic double quantum wells under effects of magnetic field and temperature

Abstract

This study examines the electronic characteristics of a diluted magnetic semiconductor double quantum well (DQW) based on the $\text{CdTe}/{\text{Cd}}_{1-x}{\text{Mn}}_x\text{Te}$ system. Through an in-depth analysis, it assesses how various parameters including the well width ($L_w$), impurity position ($z_i$), magnetic field intensity ($\gamma$), and temperature ($T$) affect the binding energy ($E_b$) and diamagnetic susceptibility (${\chi }_{\text{dia}}$). Additionally, the investigation considers the spin polaronic shift ($E_{\text{sp}}$), taking into account the same influencing factors. The findings demonstrate that an increasing magnetic field leads to a reduction in $E_b$, particularly when the impurity is positioned at the center of the well in a semimagnetic DQW structure. Furthermore, the results indicate that a rise in temperature also diminishes $E_b$. Interestingly, temperature and magnetic field exhibit opposing effects on the spin polaronic shift. Moreover, the ${\chi }_{\text{dia}}$ is found to be dependent on the impurity location, DQW geometry, applied magnetic field, and temperature.