title: Use of the rVV10 Nonlocal Correlation Functional in the B97M-V Density Functional: Defining B97M-rV and Related Functionals.
abstract: The VV10 and rVV10 nonlocal correlation functionals are consistently implemented and assessed, with the goal of determining if the rVV10 nonlocal correlation functional can replace the VV10 nonlocal correlation functional in the recently developed B97M-V density functional, to give the B97M-rV density functional. Along the way, four density functionals are simultaneously tested: VV10, rVV10, B97M-V, and B97M-rV. An initial assessment is carried out across the S22 data set, and the short-range damping variable, b, is varied for all four density functionals in order to determine the sensitivity of the functionals to the empirical parameter. The results of this test indicate that a value of b = 6 (fortuitously the same as that in B97M-V) is suitable for B97M-rV. The functionals are then compared across an extensive database of interaction energies, and it is demonstrated that B97M-rV either matches or outperforms B97M-V for all of the tests considered. Finally, the optimization of b across the S22 data set is extended to two range-separated hybrid density functionals, ωB97X-V and ωB97M-V, and a value of b = 6.2 is recommended for both ωB97X-rV and ωB97M-rV.
authors.affiliation: Kenneth S. Pitzer Center for Theoretical Chemistry, Department of Chemistry, University of California , Berkeley, California 94720, United States.
authors.forename: Narbe
authors.identifier: http://orcid.org/0000-0002-1387-0158
authors.initials: N
authors.lastname: Mardirossian
authors.affiliation: Chemical Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States.
authors.forename: Luis
authors.identifier: http://orcid.org/0000-0001-8028-5242
authors.initials: L
authors.lastname: Ruiz Pestana
authors.affiliation: School of Chemistry, University of Southampton , Highfield, Southampton SO17 1BJ, United Kingdom.
authors.forename: James C
authors.initials: JC
authors.lastname: Womack
authors.affiliation: School of Chemistry, University of Southampton , Highfield, Southampton SO17 1BJ, United Kingdom.
authors.forename: Chris-Kriton
authors.initials: CK
authors.lastname: Skylaris
authors.affiliation: Kenneth S. Pitzer Center for Theoretical Chemistry, Department of Chemistry, University of California , Berkeley, California 94720, United States.|Chemical Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States.
authors.forename: Teresa
authors.initials: T
authors.lastname: Head-Gordon
authors.affiliation: Kenneth S. Pitzer Center for Theoretical Chemistry, Department of Chemistry, University of California , Berkeley, California 94720, United States.|Chemical Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States.
authors.forename: Martin
authors.identifier: http://orcid.org/0000-0002-4309-6669
authors.initials: M
authors.lastname: Head-Gordon