Novel formulation of the Hartree-Fock approximation: Effective band gap calculation of InAs nanorods

A novel formulation of the Hartree-Fock approximation using the flexible potential morphing method is presented. As an application we have calculated the effective band gap for InAs nanorods, where the computation of the Coulomb and exchange integrals is made by using a fast three-dimensional Fourier transform. The agreement between theoretical and experimental results is very good as regards the behavior of the effective band gap with the length of the nanorod.