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Title: Consequences of electron correlation for XPS binding energies: Representative case for C(1s) and O(1s) XPS of CO

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4964320· OSTI ID:1420727

In this paper, we present a study of the signs and the magnitudes of the errors of theoretical binding energies, BE’s, of the C(1s) and O(1s) core-levels compared to BE’s measured in X-Ray photoemission, XPS, experiments. In particular, we explain the unexpected sign of the error of the Hartree-Fock C(1s) BE, which is larger than experiment, in terms of correlation effects due to the near degeneracy of the CO(1π) and CO(2π) levels and show how taking this correlation into account leads to rather accurate predicted BE’s. We separate the initial state contributions of this near degeneracy, present for the ground state wavefunction, from the final state near degeneracy effects, present for the hole state wavefunctions. Thus, we are able to establish the importance for the core-level BE’s of initial state charge redistribution due to the π near-degeneracy. While the results for CO are interesting in their own right, we also consider whether our conclusions for CO are relevant for the analysis of XPS spectra of a wider range of molecules.

Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
GF2706
OSTI ID:
1420727
Journal Information:
Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Vol. 145 Journal Issue: 14; ISSN 0021-9606
Publisher:
American Institute of PhysicsCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 31 works
Citation information provided by
Web of Science

References (22)

Self-Consistent-Field Wave Functions for Hole States of Some Ne-Like and Ar-Like Ions journal August 1965
Theory of X-Ray Satellites journal April 1967
Localized and delocalized 1s core-holes in DFT calculations journal June 2007
A complete active space SCF method (CASSCF) using a density matrix formulated super-CI approach journal May 1980
Line intensities in the 3-0 band of CO and dipole moment matrix elements for the CO molecule journal October 1969
Koopmans' theorem for inner-shell ionization journal October 1970
Thermodynamic interpretation of chemical shifts in core-electron binding energies journal April 1970
Prediction of core level binding energies in density functional theory: Rigorous definition of initial and final state contributions and implications on the physical meaning of Kohn-Sham energies journal June 2015
The interpretation of XPS spectra: Insights into materials properties journal June 2013
Inexpensive determinations of valence virtual MOs for CI calculations journal September 1986
Density functional theory calculation of 2p core-electron binding energies of Si, P, S, Cl, and Ar in gas-phase molecules journal March 2006
Anomalous electron correlation due to near degeneracy effects: Low-lying ionic states of Ne and Ar journal April 2006
Atomic near-degeneracy for photoemission: Generality of 4f excitations journal September 2008
A new near degeneracy effect for photoemission in transition metals journal August 2004
Relativistic quantum chemistry: the MOLFDIR program package journal June 1994
Interpretation of the Kohn–Sham orbital energies as approximate vertical ionization potentials journal February 2002
Performance of the TPSS Functional on Predicting Core Level Binding Energies of Main Group Elements Containing Molecules: A Good Choice for Molecules Adsorbed on Metal Surfaces journal December 2015
Core ionization potentials in carbon monoxide journal January 1976
Vibrational excitation in C 1s and O 1s photoionization of CO journal November 1997
Quelques aspects de la théorie des orbitales moléculaires journal January 1949
The Direct CI Method book January 1983
Assessment of dynamical and nondynamical correlation energy components for the beryllium-atom isoelectronic sequence journal February 1999

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