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25 April 2024

» arxiv » 1006.0583

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CeFePO: f-d hybridization and quenching of superconductivity
M. G. Holder ; A. Jesche ; P. Lombardo ; R. Hayn ; D. V. Vyalikh ; S. Danzenbächer ; K. Kummer ; C. Krellner ; C. Geibel ; Yu. Kucherenko ; T. Kim ; R. Follath ; S. L. Molodtsov ; C. Laubschat ;
Date:	3 Jun 2010
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.
Source:	arXiv, 1006.0583
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