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Performance of range-separated long-range SOPPA short-range density functional theory method for vertical excitation
Juliane H Fuglsbjerg1, Dániel Nagy1, Hans Jørgen Aa Jensen2
1Department of Chemistry, University of Copenhagen, Copenhagen Ø, Denmark.
Abstract:
In this paper, benchmark results are presented on the calculation of vertical electronic excitation energies using a long-range second-order polarization propagator approximation (SOPPA) description with a short-range density functional theory description based on the Perdew-Burke-Ernzerhof (PBE) functional. The excitation energies are investigated for 132 singlet states and 71 triplet states across 28 medium-sized organic molecules. The results show that overall SOPPA-srPBE always performs better than PBE and that SOPPA-srPBE performs better than SOPPA for singlet states, but slightly worse than SOPPA for triplet states when CC3 results are the reference values.
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