Influence of size polydispersity on the elastic constants of F.C.C. crystals of static soft spheres

Elastic constants of three-dimensional systems of soft spheres, interacting through n-inverse power potential and exhibiting aperiodicity (caused by the size polydispersity of the spheres), have been determined at 0 K by computer simulations. It has been shown that Poisson’s ratio, as well as other elastic constants, increase with increasing disorder in the system at a fixed number density of spheres.