How chemical pressure affects the fundamental properties of rare-earth pnictides: An ARPES view

Research output: Contribution to journalLetterContributedpeer-review

Contributors

  • M. G. Holder - , TUD Dresden University of Technology (Author)
  • A. Jesche - , Max Planck Society, Social Neurosci Lab (Author)
  • P. Lombardo - , Aix-Marseille Université (Author)
  • R. Hayn - , Aix-Marseille Université (Author)
  • D. V. Vyalikh - , Chair of Surface Physics (Author)
  • K. Kummer - , European Synchrotron Radiat Facil, European Synchrotron Radiation Facility (ESRF) (Author)
  • S. Danzenbaecher - , Chair of Surface Physics (Author)
  • C. Krellner - , Max Planck Society, Social Neurosci Lab (Author)
  • C. Geibel - , Max Planck Society, Social Neurosci Lab (Author)
  • E. D. L. Rienks - , Helmholtz Centre Berlin for Materials and Energy (Author)
  • S. L. Molodtsov - , European XFEL (Author)
  • C. Laubschat - , Chair of Surface Physics (Author)

Abstract

Angle-resolved photoelectron spectroscopy, supplemented by theoretical calculations has been applied to study the electronic structure of heavy-fermion material CeFePO, a homologue to the Fe-based high-temperature superconductors, and CeFeAs0.7P0.3O, where the applied chemical pressure results in a ferromagnetic order of the 4f moments. A comparative analysis reveals characteristic differences in the Fe-derived band structure for these materials, implying a rather different hybridization of valence electrons to the localized 4f orbitals. In particular, our results suggest that the ferromagnetism of Ce moments in CeFeAs0.7P0.3O is mediated mainly by Fe 3d(xz/yz) orbitals, while the Kondo screening in CeFePO is instead due to a strong interaction of Fe 3d(3z)(-r)(2)(2) orbitals.

Details

Original languageEnglish
Article number020506(R)
Number of pages5
JournalPhysical Review B
Volume86
Issue number2
Publication statusPublished - 30 Jul 2012
Peer-reviewedYes

External IDs

Scopus 84864470555

Keywords