Magnetic impurity-related optical absorption coefficients in a semimagnetic double quantum well under magnetic field and temperature effects

Abstract

This research explores how temperature (\(\mathrm{T}\)) and magnetic field (\(\upgamma\)) influence the optical absorption coefficients (OACs) and oscillator strength (\({\mathrm{OS}}_{\mathrm{fi}}\)) of a magnetic impurity (\({\mathrm{Mn}}^{2+}\)) embedded within a \(\mathrm{CdTe}/{\mathrm{Cd}}_{1-\mathrm{x}}{\mathrm{Mn}}_{\mathrm{x}}\mathrm{Te}\) dilute magnetic double quantum well (DQW). The calculation is conducted using the variational approach within the framework of the effective mass approximation (EMA). Additionally, the analysis incorporates the spin polaronic shift (SP Shift), evaluating its impact on the magnetic impurity states (\(1\mathrm{s}\) and \({2\mathrm{p}}_{\mathrm{x}}\)). The outcomes demonstrate that the OAC attaints its peak intensity when \({\mathrm{Mn}}^{2+}\) is situated at the center of the barrier compared to other positions. Moreover, variations in \(\upgamma\) and \(\mathrm{T}\) lead to a reduction in the OAC magnitude and cause a red shift in the peak position. Besides that, the aforementioned effects have on opposite impact on the spin orientations.