CeFePO: fd 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. K. Kim, R. Follath, S. L. Molodtsov, and C. Laubschat
Phys. Rev. Lett. 104, 096402 – Published 5 March 2010

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 4f states hybridize to the Fe 3d states of d3z2r2 symmetry near the Fermi level that discloses their participation in the occurring electron-correlation phenomena and provides insight into mechanism of superconductivity in oxopnictides.

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  • Received 8 December 2009

DOI:https://doi.org/10.1103/PhysRevLett.104.096402

©2010 American Physical Society

Authors & Affiliations

M. G. Holder1, A. Jesche2, P. Lombardo3, R. Hayn3, D. V. Vyalikh1, S. Danzenbächer1, K. Kummer1, C. Krellner2, C. Geibel2, Yu. Kucherenko4, T. K. Kim5, R. Follath6, S. L. Molodtsov1,7, and C. Laubschat1

  • 1Institut für Festkörperphysik, Technische Universität Dresden, D-01062 Dresden, Germany
  • 2Max-Planck-Institut für Chemische Physik fester Stoffe, D-01187 Dresden, Germany
  • 3Institut Matériaux, Microélectronique et Nanosciences de Provence, Faculté St. Jérôme, 13397 Marseille, France
  • 4Institute for Metal Physics, National Academy of Sciences of Ukraine, UA-03142 Kiev, Ukraine
  • 5Institut für Festkörperforschung, IFW Dresden, D-01171 Dresden, Germany
  • 6Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Elektronenspeicherring BESSY II, D-12489 Berlin, Germany
  • 7European XFEL GmbH, D-22761 Hamburg, Germany

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Vol. 104, Iss. 9 — 5 March 2010

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