Band structure of a semimagnetic semiconducting alloy: A photoemission study ofCd1−xMnxTe

The band structure of ${\mathrm{Cd}}_{1\mathrm{-}\mathrm{x}}$ ${\mathrm{Mn}}_{\mathrm{x}}$Te (x=0,0.15,0.5) has been investigated using synchrotron radiation and photoemission in the constant-final-state mode. Satisfactory agreement between theory and experiment is found for pure CdTe. Alloying has the effect of broadening the spectral features and increasing the background. No strong features are observed which could be associated with the Mn 3d states. The absence is assigned to low photoemission cross section at the photon energies used (12–40 eV), as suggested by Taniguchi et al. Dispersion of the Te 5s level is also reported.