CeFePO: f-d hybridization and quenching of superconductivity

Abstract

Being homologue to the new, Fe-based type of high-temperature superconductors, CeFePO exhibits magnetism, Kondo and heavy-fermion phenomena. We experimentally studied the electronic structure of CeFePO by means of angle-resolved photoemission spectroscopy. In particular, contributions of the Ce 4f-derived states and their hybridization to the Fe 3d bands were explored using both symmetry selection rules for excitation and their photoionization cross-section variations as a function of photon energy. It was experimentally found - and later on confirmed by LDA as well as DMFT calculations - that the Ce 4f states hybridize to the Fe 3d states of d_{3z^2-r^2} symmetry near the Fermi level that discloses their participation in the occurring electron-correlation phenomena and provides insight into mechanism of superconductivity in oxopnictides.

arXiv comment5 pages, 3 figures

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Cited by in corpus (6)

• Nd induced Mn spin-reorientation transition in NdMnAsO
• Avoided ferromagnetic quantum critical point: Unusual short-range ordered state in CeFePO
• Angle-resolved photoemission spectroscopy study of PrFeAsO_{0.7}: Dependence of the electronic structure on the pnictogen height
• Electron doping of the iron-arsenide superconductor CeFeAsO controlled by hydrostatic pressure
• Suppression of the magnetic order in CeFeAsO: non-equivalence of hydrostatic and chemical pressure
• How chemical pressure affects the fundamental properties of rare-earth pnictides: an ARPES view