ELECTRONIC-STRUCTURE OF ZN1-XMNXTE

The electronic structures of ZnTe and Zn0.7Mn0.3Te have been investigated by means of synchrotron-radiation photoemission experiments. Te 4d core-yield spectra of ZnTe and Zn0.7Mn0.3Te reflect the density of states (DOS) of the conduction bands. The two DOS peaks in the ZnTe spectrum observed at 0.6 and 4.3 eV above the conduction-band minimum are ascribed to relatively flat regions of the conduction bands near the L1 and X1, and the GAMMA15 and L3, symmetry points, respectively. The contribution of the Mn 3d states to the valence bands Of Zn0.7Mn0.3Te has been evaluated by means of resonant enhancement of Mn 3d photoionization cross section near the Mn 3p-3d core excitation. The Mn 3d-derived partial DOS of Zn0.7Mn0.3Te is found to be very similar to that of Cd0.8Mn0.2Te. This suggests nearly equal Mn-Te bond lengths in these ternary alloys.