Lattice dynamics and the diffuse phase transition of lithium sulphide investigated by coherent neutron scattering
W Buehrer; F Altorfer; J Mesot; H Bill; P Carron; H G Smith; W Buehrer; Labor fur Neutronenstreuung, ETHZ, Villigen, Switzerland; F Altorfer; Labor fur Neutronenstreuung, ETHZ, Villigen, Switzerland; J Mesot; Labor fur Neutronenstreuung, ETHZ, Villigen, Switzerland; H Bill; Labor fur Neutronenstreuung, ETHZ, Villigen, Switzerland; P Carron; Labor fur Neutronenstreuung, ETHZ, Villigen, Switzerland; H G Smith; Labor fur Neutronenstreuung, ETHZ, Villigen, Switzerland
Журнал:
Journal of Physics: Condensed Matter
Дата:
1991-03-04
Аннотация:
Elastic neutron diffraction of Li<sub>2</sub>S, measured as a function of temperature, shows the onset of a diffuse phase transition near 900 K to a highly conducting state. Inelastic neutron scattering has been used to investigate the harmonic lattice dynamics of Li<sub>2</sub>S at 15 K. A shell model has been successfully fitted to the data. The dynamical properties are computed within the harmonic approximation and compared with experimental data.
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