Abstract
A phenomenological model for lattice dynamics of b.c.c. metals is proposed by combining central ion-ion interaction on BVK scheme, angular ion-ion interaction onClark-Gazis-Wallis scheme and electron-ion interaction onKrebs’s scheme with an essential modification of the dielectric screening function. Calculated phonon dispersion curves of sodium along all the five principal symmetry directions as well as (Θ−T) curve of it show a good agreement with the experimental findings.
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Shukla, M.M., Tejima, H. An angular force model for lattice dynamics of body centered cubic metals. Acta Physica 41, 31–40 (1976). https://doi.org/10.1007/BF03157428
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DOI: https://doi.org/10.1007/BF03157428