X-ray absorption spectroscopy study of diluted magnetic semiconductors: Zn(1-xMxSe M = Mn, Fe, Co) and Zn1-xMnxY (Y = Se, Te) - art. no. 155203

We have investigated 3d electronic states of doped transition metals in II- VI diluted magnetic semiconduc rors Zn1-xMxSe (M = Mn,Fe,Co) and Zn1-xMnxY (Y = Se,Te), using the transition-metal L-2,L-3-edge x-ray absorption spect roscopy (XAS) measurements. In order to explain the XAS spectra, we employe d a tetragonal cluster model calculation, which includes not only the full ionic multiplet structure but also configuration interaction (CI). The resu lts show that CI is essential to describe the experimental spectra adequate ly, indicating the strong hybridization between the transition metal 3d and the ligand p orbitals. In the study of Zn1-xMnxY (Y = Se,Te), we also foun d considerable spectral change in the Mn L-2,L-3-edge XAS spectra for diffe rent ligands, confirming the importance of the hybridization effects in the se materials.