This study explores the determination of the range-determining parameter in the orbital-specific (OS) range-separated hybrid functional by the linearity condition for orbital energies. The OS range-separated hybrid functionals with the optimized range-determining parameters exhibit a less fractional-occupation- number electron dependence for orbital energies and successfully estimate ionization potentials for valence as well as inner valence and core orbitals in the sense of Koopmans' theorem.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Physical and Theoretical Chemistry