Abstract
We have studied the spin-spin coupling between two electrons of nonmagnetic Ce by means of spin-resolved resonant photoemission using circularly polarized synchrotron radiation. The two electrons participating in the resonance process are coupled in a singlet while the coupling is veiled in the process due to an additional Coster-Kronig decay channel. The identical singlet coupling is observed in the 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.
- Received 14 October 2005
DOI:https://doi.org/10.1103/PhysRevB.73.075116
©2006 American Physical Society