
TY  - JOUR
A1  - Oitmaa, J 
T1  - Lattice Dynamics of Simple Harmonic and Anharmonic Shell Models
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1967
VL  - 20
IS  - 5
SP  - 495
EP  - 506
KW  - 
UR  - https://doi.org/10.1071/PH670495 
N2  - 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. 
ER  -

