We have studied the spin-spin coupling between two f electrons of nonmagnetic Ce by means of spin-resolved resonant photoemission using circularly polarized synchrotron radiation. The two f electrons participating in the 3d5/2-->4f resonance process are coupled in a singlet while the coupling is veiled in the 3d3/2-->4f process due to an additional Coster-Kronig decay channel. The identical singlet coupling is observed in the 4d-->4f resonance process. Based on the Ce measurements, it is argued that spin-resolved resonant photoemission is one approach to study the correlation effects, particularly in the form of spin, in the rare earths.
S. W. Yu et al., "Ƒ-electron Correlations in Nonmagnetic Ce Studied by Means of Spin-Resolved Resonant Photoemission," Physical Review B, American Physical Society (APS), Feb 2006.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevB.73.075116
United States. Department of Energy
University of California (System)
Keywords and Phrases
Electron Correlations; Spin Polarised Transport; Cerium; Photoemission
Article - Journal
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