title: Improved DFT Potential Energy Surfaces via Improved Densities.
abstract: Density-corrected DFT is a method that cures several failures of self-consistent semilocal DFT calculations by using a more accurate density instead. A novel procedure employs the Hartree-Fock density to bonds that are more severely stretched than ever before. This substantially increases the range of accurate potential energy surfaces obtainable from semilocal DFT for many heteronuclear molecules. We show that this works for both neutral and charged molecules. We explain why and explore more difficult cases, for example, CH(+), where density-corrected DFT results are even better than sophisticated methods like CCSD. We give a simple criterion for when DC-DFT should be more accurate than self-consistent DFT that can be applied for most cases.
authors.affiliation: Department of Chemistry and Institute of Nano-Bio Molecular Assemblies, Yonsei University , 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Korea.
authors.forename: Min-Cheol
authors.initials: MC
authors.lastname: Kim
authors.affiliation: Department of Chemistry and Institute of Nano-Bio Molecular Assemblies, Yonsei University , 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Korea.
authors.forename: Hansol
authors.initials: H
authors.lastname: Park
authors.affiliation: Department of Chemistry and Institute of Nano-Bio Molecular Assemblies, Yonsei University , 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Korea.
authors.forename: Suyeon
authors.initials: S
authors.lastname: Son
authors.affiliation: Department of Chemistry and Institute of Nano-Bio Molecular Assemblies, Yonsei University , 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Korea.
authors.forename: Eunji
authors.initials: E
authors.lastname: Sim
authors.affiliation: Department of Chemistry, University of California , 1102 Natural Sciences 2, Irvine, California 92697, United States.
authors.forename: Kieron
authors.initials: K
authors.lastname: Burke