ELECTRONIC-STRUCTURE OF CD1-XMNXS TERNARY SEMIMAGNETIC ALLOYS

We present synchrotron-radiation photoemission studies of the electronic structure of Cd1-xMnxS alloys, together with results for the parent binary compound CdS. Analysis of the partial photoionization cross section at the Mn 3p-3d resonance was conducted to investigate the Mn 3d contribution to the valence bands. We use Cd1-xMnxS as a test case to examine different methods of data reduction. A comparative analysis of constant-initial-state (CIS) spectra, ternary-binary difference curves, as well as resonance-antiresonance difference curves identifies a major Mn 3d density of states feature 3.120.05 eV below the CdS valence-band maximum, together with relevant Mn 3d contribution to the electron states near the valence-band maximum and a broad satellite in the 48-eV range. A quantitative analysis of the Fano parameters derived from a least-squares fit of the CIS spectra allowed us to characterize the varying amount of Te pMn 3d hybridization in the valence states. © 1990 The American Physical Society.