1. Unexpectedly Large Electron Correlation Measured in Auger Spectra of Ferromagnetic Iron Thin Films: Orbital-Selected Coulomb and Exchange Contributions
- Author
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Riccardo Moroni, S. Iacobucci, S. R. Vaidya, Roberto Gotter, Marco Sbroscia, Francesco Bisio, Alessandro Ruocco, Francesco Offi, Adriano Verna, Giovanni Stefani, Gotter, R., Verna, A., Sbroscia, M., Moroni, R., Bisio, F., Iacobucci, S., Offi, F., Vaidya, S. R., Ruocco, A., and Stefani, G.
- Subjects
Physics ,Electronic correlation ,Strongly Correlated Electrons (cond-mat.str-el) ,General Physics and Astronomy ,FOS: Physical sciences ,Electron ,auger spectroscopy ,time-coincidence spectropscopy ,electron correlation ,01 natural sciences ,7. Clean energy ,Ion ,Auger ,photoemission spctroscopy ,Condensed Matter - Strongly Correlated Electrons ,Ferromagnetism ,0103 physical sciences ,Coulomb ,strongly correlated systems ,Condensed Matter::Strongly Correlated Electrons ,Atomic physics ,010306 general physics ,Spectroscopy ,Spin (physics) - Abstract
A set of electron-correlation energies as large as 10 eV have been measured for a magnetic 2ML Fefilm deposited on Ag(001). By exploiting the spin selectivity in angle-resolved Auger-photoelectroncoincidence spectroscopy and the Cini-Sawatzky theory, the core-valence-valence Auger spectrumof a spin-polarized system have been resolved: correlation energies have been determined for eachindividual combination of the two holes created in the four sub-bands involved in the decay: majorityand minority spin, as well asegandt2g. The energy difference between final states with paralleland antiparallel spin of the two emitted electrons is ascribed to the spin-flip energy for the final ionstate, thus disentangling the contributions of Coulomb and exchange interactions., Comment: 5 pages, 2 figures, 1 table
- Published
- 2020
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