We present a lattice-dynamics study of rocksalt cadmium oxide (CdO). We use Raman scattering to investigate a series of high-quality CdO epilayers grown on sapphire substrates by means of metal-organic vapor phase epitaxy. Two main features are found to dominate the Raman spectra of CdO: a sharp peak at and a broad feature at . To assign these and other weaker second-order features that appear in the Raman spectra, we have carried out an ab initio calculation of the phonon dispersion in CdO. From the calculated two-phonon density of states (PDOS) we tentatively assign the peak at to a mode. The broadband centered at seems to reflect the high two-PDOS in the spectral region.
Raman scattering of cadmium oxide epilayers grown by metal-organic vapor phase epitaxy
R. Cuscó, J. Ibáñez, N. Domenech-Amador, L. Artús, J. Zúñiga-Pérez, V. Muñoz-Sanjosé; Raman scattering of cadmium oxide epilayers grown by metal-organic vapor phase epitaxy. J. Appl. Phys. 15 March 2010; 107 (6): 063519. https://doi.org/10.1063/1.3357377
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