The <i>ab initio</i> density functional theory applied for spin-polarized calculations
Szymon Śmiga, Volodymyr Marusiak, Ireneusz Grabowski, Eduardo Fabiano
Abstract
We have performed a systematic and broad study of the performance of the ab initio OEP2-sc functional for spin-polarized systems, including the computation of ionization potentials and atomization and reaction energies of closed- and open-shell molecules. The results have revealed that, in line with other second-order methods, OEP2-sc can provide accurate results, being competitive to the orbital-optimized MP2 method. Moreover, the analysis of total and relative energies has shown that, unlike the case of double-hybrid functionals, this relatively good performance is not based on an error cancellation effect.
Topics & Concepts
Ab initioOpen shellDensity functional theoryAtomic physicsSpin (aerodynamics)PhysicsComputationAb initio quantum chemistry methodsIonizationHybrid functionalMoleculeMolecular physicsQuantum mechanicsIonMathematicsThermodynamicsAlgorithmAdvanced Chemical Physics StudiesMolecular Junctions and NanostructuresMachine Learning in Materials Science