Angular Forces in the Lattice Dynamics of Face-Centered Cubic Metals

Abstract

The lattice dynamics of the fcc lattice has been investigated using a model in which, in addition to central forces, interatomic forces include angular forces of the type employed by Clark, Gazis, and Wallis. The model has been applied to copper, and results are presented for dispersion curves, vibration spectra, and effective calorimetric and x-ray Debye temperatures.