Photoemission Study of the Electronic Structure of CdTe

Cardona and Greenaway's identifications of the ${E_0}^{\prime }$, ${E_1}^{\prime }$, and ${E_1}^{\prime }+{\Delta }_1$ peaks in the optical reflectivity spectrum of CdTe are contradicted by deductions drawn from photoemission measurements. New identifications of these peaks are proposed on the basis of these photoemission measurements and the results of empirically adjusted orthogonalized-plane-wave energy band calculations. Our theoretical band model for CdTe differs in some important respects from that derived by Cohen and Bergstresser using the empirical pseudopotential method.