k Dependence of the Crystal-Field Splittings of 4f States in Rare-Earth Systems

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung


  • D. V. Vyalikh - , Professur für Oberflächenphysik (Autor:in)
  • S. Danzenbaecher - , Professur für Oberflächenphysik (Autor:in)
  • Yu. Kucherenko - , Technische Universität Dresden, National Academy of Sciences of Ukraine (Autor:in)
  • K. Kummer - , Technische Universität Dresden (Autor:in)
  • C. Krellner - , Max Planck Gesellschaft, Forschungsgruppe "Soziale Neurowissenschaften" (Autor:in)
  • C. Geibel - , Max Planck Gesellschaft, Forschungsgruppe "Soziale Neurowissenschaften" (Autor:in)
  • M. G. Holder - , Technische Universität Dresden (Autor:in)
  • T. K. Kim - , Leibniz Institute for Solid State and Materials Research Dresden (Autor:in)
  • C. Laubschat - , Professur für Oberflächenphysik (Autor:in)
  • M. Shi - , Paul Scherrer Institute (Autor:in)
  • L. Patthey - , ETH Zurich (Autor:in)
  • R. Follath - , Helmholtz-Zentrum Dresden-Rossendorf (Autor:in)
  • S. L. Molodtsov - , Technische Universität Dresden, European XFEL (Autor:in)


The occupation, energy separation, and order of the crystal-field-split 4f states are crucial for the understanding of the magnetic properties of rare-earth systems. We provide the experimental evidence that crystal-field-split 4f states exhibit energy dispersion in momentum space leading to variations of energy spacings between them and even of their energy sequence across the Brillouin zone. These observations were made by performing angle-resolved photoemission experiments on YbRh2Si2 and properly simulated within a simple model based on results obtained by inelastic neutron scattering experiments and band structure calculations. Our findings should be generally applicable to rare-earth systems and have considerable impact on the understanding of magnetism and related phenomena.


FachzeitschriftPhysical review letters
PublikationsstatusVeröffentlicht - 3 Dez. 2010

Externe IDs

PubMed 21231502



  • Quantum criticality, Excitations, Ybrh2si2