Diagrammatic Multiplet-Sum Method (MSM) Density-Functional Theory (DFT): II. Completion of the Two-Orbital Two-Electron Model (TOTEM) with an Application to the Avoided Crossing in Lithium Hydride (LiH)

Mark E. Casida, Abraham Ponra, Carolyne Bakasa +1

The Ziegler-Rauk-Baerends multiplet sum method (MSM) assumes that density-functional theory (DFT) provides a good description of states dominated by a single determinant. It then u…