title: Lattice dynamics of multiferroic BiFeO3 studied by inelastic x-ray scattering.
abstract: We report an experimental study of the phonon dispersion in BiFeO(3)   single crystals at ambient conditions by inelastic x-ray scattering (IXS). The phonon dispersions were recorded along several symmetry directions up to 35 meV. Our results compare favorably with first-principles calculations performed using density functional theory (DFT) within the local-density approximation (LDA). We resolve a discrepancy concerning the symmetry of the optical phonon branches observed by Raman spectroscopy, determine the energy of the lowest Raman and infrared silent mode, and derive a subset of the elastic moduli of BiFeO(3).
authors: European Synchrotron Radiation Facility, Grenoble, France.
authors: Elena
authors: E
authors: Borissenko
authors: Marco
authors: M
authors: Goffinet
authors: Alexei
authors: A
authors: Bosak
authors: Pauline
authors: P
authors: Rovillain
authors: Maximilien
authors: M
authors: Cazayous
authors: Dorothée
authors: D
authors: Colson
authors: Philippe
authors: P
authors: Ghosez
authors: Michael
authors: M
authors: Krisch