"Beyond-Zero-Sum" Range-Separated Local Hybrid Functional with Improved Dynamical Correlation.

ABSTRACT: Recent work has shown that range-separated local hybrid (RSLH) functionals containing correction terms for strong correlation and delocalization errors, such as ωLH23tdE, allow a remarkable paradigm change in the context of the usual zero-sum game between delocalization and static correlation errors in the development of density functional approximations. In this work, we evaluate the modification of the dynamical correlation contribution for such strong correlation-corrected RSLHs (scRSLHs) and how it affects the performance of the large GMTKN55 database of main-group thermochemistry, kinetics, and noncovalent interactions. Replacing the B95c correlation in the previous functionals by a more flexible reoptimized B97c power-series expansion leads to substantial improvements. The ωLH25tdE s

SUBMITTER: Wodynski A 

PROVIDER: S-EPMC12355696 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature