Interband magnetoabsorption spectra of Mn-doped ZnO nanowires

Abstract The electronic structures of Mn-doped ZnO nanowires in the magnetic field are calculated based on the six-band k · p effective-mass theory. Through the calculation, it is found that the first two valence subbands with positive spin angular momentum J h will reverse when the magnetic field is greater than a critical value, while they will not reverse when J h is negative. Several lowest transitions are shown and the interband magnetoabsorption spectra of Mn-doped ZnO nanowires at the Γ point are also presented in the magnetic field, and it is found that the lowest optical transition is left circular polarized light. Meanwhile, red shifts of the absorption peaks will occur if the magnetic field is applied, and the absorption peaks will show blue shifts with the increase of the temperature. In addition, quasi-Fermi level of the valence subbands of Mn-doped ZnO nanowires increase with the increase of the temperature, and more absorption peaks will arise when the carrier density and the temperature increase.