title: Second-order Raman scattering in CuO.
abstract: Polarized second-order Raman scattering spectra of CuO single crystals are reported. It is shown that for some scattering geometries the second-order processes dominate the inelastic light scattering spectra. Group-theoretical symmetry analysis of the selection rules for the first- and second-order scattering processes is performed and phonon dispersion relations are calculated within density functional theory. The main spectral features of the two-phonon spectra are assigned to overtones of the vibrational branches at various special points across the Brillouin zone.
authors: Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5002, USA. Litvin@central.uh.edu
authors: A P
authors: AP
authors: Litvinchuk
authors: A
authors: A
authors: Möller
authors: L
authors: L
authors: Debbichi
authors: P
authors: P
authors: Krüger
authors: M N
authors: MN
authors: Iliev
authors: M M
authors: MM
authors: Gospodinov