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Title: Photoelectron spectra of copper oxide cluster anions from first principles methods

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.5038744· OSTI ID:1511172
 [1];  [2];  [3];  [2];  [1]
  1. Univ. of Illinois, Chicago, IL (United States)
  2. Weizmann Institute of Science, Rehovoth (Israel)
  3. Univ. Paris-Saclay, Gif-sur-Yvette (France)

We present results and analyses for the photoelectron spectra of small copper oxide cluster anions (CuO, CuO2, CuO3, and Cu2O). The spectra are computed using various techniques, including density functional theory (DFT) with semi-local, global hybrid, and optimally tuned range-separated hybrid functionals, as well as many-body perturbation theory within the GW approximation based on various DFT starting points. The results are compared with each other and with the available experimental data. We conclude that as in many metal-organic systems, self-interaction errors are a major issue that is mitigated by hybrid functionals. However, these need to be balanced against a strong role of non-dynamical correlation—especially in smaller, more symmetric systems—where errors are alleviated by semi-local functionals. In conclusion, the relative importance of the two phenomena, including practical ways of balancing the two constraints, is discussed in detail.

Research Organization:
Univ. of Illinois, Chicago, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0017824; AC02-05CH11231
OSTI ID:
1511172
Alternate ID(s):
OSTI ID: 1464319
Journal Information:
Journal of Chemical Physics, Vol. 149, Issue 6; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

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