Lattice dynamics of molecular solids by a phenomenological model

✍ Scribed by P.K Garg; N.P Gupta

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 637 KB
• Volume: 91
• Category: Article
• ISSN: 0003-4916
• DOI: 10.1016/0003-4916(75)90227-4

✦ Synopsis

A quasiharmonic central-force rigid-atom model has been used to study the dispersion of phonon waves in molecular (rare-gas) solids. The model derives the interatomic forces by Buckingham-Corner potential and takes account of all neighbor interactions. Zero-point anharmonic effects have been taken into account throughthepotential parameters by a method of iteration. It is found that out of all the conventional power and exponential potentials the Buckingham-Corner potential function is best suited to this class of molecular solids. Further, the possibilities of the improvement of the present model have been discussed.