Comparison of CdO valence region XPS with theoretical density of states
This graph shows the theoretical valence-band structure of rocksalt phase cadmium oxide in the lower portion of the figure with the high symmetry points indicated . The density of states of the valence bands is shown as a projection onto the energy scale of the upper portion of the figure (shaded grey). The blue circles show an x-ray photoemission spectrum of the valence band region of single crystal CdO . The black line shows a Gaussian broadened plot of the density of states, accounting for the XPS instrumental resolution, offset to match the zero-energy reference of the experimental data .
 A. Schleife, F. Fuchs, J. Furthmüller, and F. Bechstedt. First- principles study of ground- and excited-state properties of MgO, ZnO, and CdO polymorphs. Phys. Rev. B, 73 (2006) 245212.
 Details of growth: J. Zuñiga-Pérez, C. Munuera, C. Ocal and V. Muñoz-Sanjosé. Structural analysis of CdO layers grown on r-plane sapphire (01-12) by metalorganic vapor-phase epitaxy J. Cryst. Growth 271 (2004) 233.
 P. H. Jefferson, T. D. Veal, P. D. X. King, C. F. McConville et al. (in preparation for submission to Phys. Rev. B)
Submitted by P.H. Jefferson, Department of Physics, University of Warwick, UK.