Optical study ofMn2+intraionic transitions in zinc-blende MnTe

${\mathrm{Mn}}^{2+}$ d-${\mathit{d}}^{\mathrm{*}}$ multiplet transitions in zinc-blende MnTe were studied with photoluminescence, absorption, and magnetic circular dichroism spectroscopy. A simple ligand-field theory with Racah parameters, B=0.045 91 eV, C=0.4363 eV, and Dq=0.077 63 eV, can well reproduce the observed absorption bands from ${}_{}{}^6{}_{}{}^{}$ ${\mathit{A}}_1$ ${(}^6$S) to ${}_{}{}^4{}_{}{}^{}$ ${\mathit{T}}_1$ ${(}^4$G), ${}_{}{}^4{}_{}{}^{}$ ${\mathit{T}}_2$ ${(}^4$G), ${}_{}{}^4{}_{}{}^{}$ ${\mathit{A}}_1$ ${(}^4$G), ${}_{}{}^4{}_{}{}^{}$E${(}^4$G), ${}_{}{}^4{}_{}{}^{}$ ${\mathit{T}}_2$ ${(}^4$D), ${}_{}{}^4{}_{}{}^{}$E${(}^4$D), and ${}_{}{}^2{}_{}{}^{}$ ${\mathit{T}}_2$ ${(}^2$I) multiplets. The magnetic circular dichroism spectrum clearly showed the existence of the Zeeman effect for ${\mathrm{Mn}}^{2+}$ multiplet transitions. The effective g value of ${\mathrm{Mn}}^{2+}$ multiplets was roughly estimated to be ∼2.2, which implies that the strong optical-absorption bands of ${\mathrm{Mn}}^{2+}$ d-${\mathit{d}}^{\mathrm{*}}$ multiplets are nonmagnon sideband-type transitions.