The degree of electron itinerancy and shell closing in the core-ionized state of transition metals probed by Auger-photoelectron coincidence spectroscopyShow others and affiliations
2022 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 24, no 32, p. 19218-19222Article in journal (Refereed) Published
Abstract [en]
Auger-photoelectron coincidence spectroscopy (APECS) has been used to examine the electron correlation and itinerance effects in transition metals Cu, Ni and Co. It is shown that the LVV Auger, in coincidence with 2p photoelectrons, spectra can be represented using atomic multiplet positions if the 3d-shell is localized (atomic-like) and with a self-convoluted valence band for band-like (itinerant) materials as explained using the Cini-Sawatzky model. For transition metals, the 3d band changes from band-like to localized with increasing atomic number, with the possibility of a mixed behavior. Our result shows that the LVV spectra of Cu can be represented by atomic multiplet calculations, those of Co resemble the self-convolution of the valence band and those of Ni are a mixture of both, consistent with the Cini-Sawatzky model.
Place, publisher, year, edition, pages
Royal Society of Chemistry (RSC) , 2022. Vol. 24, no 32, p. 19218-19222
Keywords [en]
Atoms, Augers, Convolution, Photoelectrons, Photoionization, Photons, Valence bands, Atomic numbers, Auger-photoelectron coincidence spectroscopy, Ionized state, Localised, Photoelectron spectrum, Spectra's, Transition metals
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-326465DOI: 10.1039/d2cp02477bISI: 000835896400001PubMedID: 35920216Scopus ID: 2-s2.0-85135571500OAI: oai:DiVA.org:kth-326465DiVA, id: diva2:1758274
Note
QC 20230522
2023-05-222023-05-222023-05-22Bibliographically approved