J. Phys. Colloques
Volume 42, Numéro C6, Décembre 1981International Conference on Phonon Physics
|Page(s)||C6-175 - C6-177|
J. Phys. Colloques 42 (1981) C6-175-C6-177
VIBRATIONS AND DIFFUSION OF ATOMS IN SUPERIONIC CRYSTALS AND MELTSR.J. Elliott et M. Dixon
Department of Theoretical Physics, Oxford University, Oxford, U.K.
Recent computer simulation studies contain sufficient information about the atomic disorder and motion to allow a calculation of the dynamical response of superionic crystals and melts which may be compared with measurements of inelastic neutron scattering and Raman scattering. The high frequency part of this response is essentially that of anharmonic vibrations in a disorderd lattice. The low frequency part results from correlated jump diffision of the atoms.