Abstract
As a homologue to the new, Fe-based type of high-temperature superconductors, the electronic structure of the heavy-fermion compound CeFePO was studied by means of angle-resolved resonant photoemission. It was experimentally found—and later on confirmed by local-density approximation (LDA) as well as dynamical mean-field theory (DMFT) calculations—that the Ce states hybridize to the Fe states of symmetry near the Fermi level that discloses their participation in the occurring electron-correlation phenomena and provides insight into mechanism of superconductivity in oxopnictides.
- Received 8 December 2009
DOI:https://doi.org/10.1103/PhysRevLett.104.096402
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