Electrostatic shielding effect of ground state energy of metallic elements and non-metallic elements

The ground state energy is great importance for studying the properties of a material. In this study, we computed both the Hartree-Fock approximation and the random phase approximation of the ground state energy. Considering the effect of the electrostatic shielding potential, we utilized the Thomas-Fermi dielectric function to obtain the Thomas-Fermi formula for the total potential energy. We subsequently calculated the total potential energy of the metallic and non-metallic elements in the periodic table using Wigner correlation energy and Hedin-Lundqvist correlation energy, considering the changes in the correlation energies after considering electrostatic shielding effects.The exchange correlation potential including electrostatic shielding effect can be used in the measurement of SIM experiments.