We have used numerical methods to solve the Kohn-Sham equations of the
Density Functional Theory DFT, within local density approximation LDA
employing different pseudopotentials in order to obtain equilibrium structure
and properties of some mater
ials (namely Si, Cu, and Ni). We used in these
calculations a number of pseudopotentials in order to obtain the most accurate
results, and we varied the computational procedure by choosing different Kpoint
sampling and different numerical methods for the same purpose.
The results we have obtained from these ab initio calculations are in good
agreement with experimental results, which allows us to use the same
techniques for further study of some properties of materials.