Lattice Dynamics of Simple Harmonic and Anharmonic Shell Models
Open Access
- 1 January 1967
- journal article
- research article
- Published by CSIRO Publishing in Australian Journal of Physics
- Vol. 20 (5) , 495-506
- https://doi.org/10.1071/ph670495
Abstract
The lattice dynamics of harmonic and anharmonic shell models are reviewed. It is shown that the various dynamical equations for the shell model can be expressed in the same form as those for the rigid ion model, but with modified force constants. The anharmonic shell model leads to higher order contributions to the dipole moment, quadratic and cubic in the normal coordinates, for which explicit expressions are obtained.Keywords
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