Ƒ-electron Correlations in Nonmagnetic Ce Studied by Means of Spin-Resolved Resonant Photoemission

S. W. Yu
Takashi Komesu
B. W. Chung
Simon A. Morton
James G. Tobin
George Daniel Waddill, Missouri University of Science and Technology

This document has been relocated to http://scholarsmine.mst.edu/phys_facwork/351

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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.