CACULATION OF THE INTERATOMIC FORCE CONSTANTS FOR A CUBIC LATTICE IN THE LONG-WAVELENGTH APPROXIMATION

O. V. Knihinitskyi

Department for Theoretical Physics, Ivan Franko National University of Lviv,
12 Drahomanov St., Lviv, UA-79005, Ukraine
E-mail: knih@ktf.franko.lviv.ua

The long-wavelength method is applied to calculate interatomic force constants for a cubic lattice with the nearest and next-to-nearest neighbours taken into account. In the final expressions the interatomic potential parameters in the two-particle approach are represented via elastic modules of crystal. Using the numerical method the parameters of a power potential are obtained.

PACS number(s): 62.20.Dc, 62.30.+d, 63.10.+a

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