Short‐range correlation energy of the relativistic homogeneous electron gas

• DOI: 10.1002/qua.26685
• Publication Date: 2021-05-03T11:46:56Z
• Authors: Julien Paquier; Julien Toulouse
• Keywords: Random phase approximation; Hamiltonian (control theory); Relativistic quantum chemistry; Electronic correlation

We construct the complementary short-range correlation relativistic local-density-approximation functional to be used in range-separated density-functional theory based on a Dirac-Coulomb Hamiltonian no-pair approximation. For this, we perform random-phase-approximation calculations of energy homogeneous electron gas with modified electron-electron interaction, study high-density behavior, and fit results parametrized expression. The obtained should eventually useful for electronic-structure strongly correlated systems containing heavy elements.