Estimation of the range of atomic forces in crystals from phonon frequency spectra

Abstract

In 1957, Foreman and Lomer proposed a method of estimating the harmonic forces between parallel atomic planes of primitive cubic crystals from the phonon dispersion relations along principal directions. It is shown that it is more appropriate to apply their method to certain combinations of the phonon dispersion relations rather than to the individual dispersion relations themselves. It is also shown how the method may be extended to the h.c.p. and diamond lattices. Show more