Ab Initio Hartree-Fock Calculation of Electronic Band Structure in Transition Metal Silicides

\textit{Ab initio} Hartree-Fock method has been used to calculate electronic properties in CoSi$_{2}$ and NiSi$_{2}$. \textit{A posteriori} DFT energy correction has been included in order to test the effect of electronic correlation using B3LYP, VWM and LDA approximations for the correlation term. No correlation and VWM correlation results are compared, finding that the electronic correlation produces band gaps at specific high symmetry points in the first Brillouin zone. Total energy results indicate that correlation energy is high compared to the Hartree-Fock energy for both Co and Ni silicides. This is an indication that CoSi$_{2}$ and NiSi$_{2}$ are highly correlated systems.