Origin-Independent Dynamic Polarizability Density from Coupled Cluster Response Theory

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  • Francesco F. Summa
  • J. H. Andersen
  • Paolo Lazzeretti
  • Sauer, Stephan P. A.
  • G. Monaco
  • Sonia Coriani
  • Ricardo Zanasi
The calculation of the origin-independent density of the dynamic electric dipole polarizability, previously presented for uncorrelated and density functional theory (DFT)-based methods, has been developed and implemented at the coupled cluster singles and doubles (CCSD) level of theory. A pointwise analysis of polarizability densities calculated for a number of molecules at Hartree–Fock (HF) and CCSD clearly shows that the electron correlation effect is much larger than one would argue considering the integrated dipole electric polarizability alone. Large error compensations occur during the integration process, which hide fairly large deviations mainly located in the internuclear regions. The same is observed when calculated CCSD and B3LYP polarizability densities are compared, with the remarkable feature that positive/negative deviations between CCSD and HF reverse sign, becoming negative/positive when comparing CCSD to B3LYP.
OriginalsprogEngelsk
TidsskriftJournal of Chemical Theory and Computation
Vol/bind19
Udgave nummer20
Sider (fra-til)7242-7259
Antal sider18
ISSN1549-9618
DOI
StatusUdgivet - 5 okt. 2023

ID: 369254422