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  Exploring the Accuracy of a Low Scaling Similarity Transformed Equation of Motion Method for Vertical Excitation Energies

Dutta, A. K., Nooijen, M., Neese, F., & Izsák, R. (2018). Exploring the Accuracy of a Low Scaling Similarity Transformed Equation of Motion Method for Vertical Excitation Energies. Journal of Chemical Theory and Computation, 14(1), 72-91. doi:10.1021/acs.jctc.7b00802.

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 Creators:
Dutta, Achintya Kumar1, Author           
Nooijen, Marcel2, Author
Neese, Frank1, Author           
Izsák, Róbert1, Author           
Affiliations:
1Research Department Neese, Max Planck Institute for Chemical Energy Conversion, Max Planck Society, ou_3023886              
2Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada, ou_persistent22              

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 Abstract: The newly developed back transformed pair natural orbital based similarity transformed equation of motion (bt-STEOM) method at the coupled cluster singles and doubles level (CCSD) is combined with an appropriate modification of our earlier active space selection scheme for STEOM. The resulting method is benchmarked for valence, Rydberg, and charge transfer excited states of Thiel’s test set and other test systems. The bt-PNO-STEOM-CCSD method gives very similar results to canonical STEOM-CCSD for both singlet and triplet excited states. It performs in a balanced manner for all these types of excited states, while the EOM-CCSD method performs especially well for Rydberg excited states and the CC2 method excels at obtaining accurate results for valence excited states. Both EOM-CCSD and CC2 perform worse than bt-PNO-STEOM-CCSD for charge transfer states for the test cases studied.

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Language(s): eng - English
 Dates: 2017-12-192018-01-09
 Publication Status: Issued
 Pages: 20
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acs.jctc.7b00802
 Degree: -

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Title: Journal of Chemical Theory and Computation
  Abbreviation : J. Chem. Theory Comput.
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Chemical Society
Pages: - Volume / Issue: 14 (1) Sequence Number: - Start / End Page: 72 - 91 Identifier: ISSN: 1549-9618
CoNE: https://pure.mpg.de/cone/journals/resource/111088195283832