Divalent EuRh 2 Si 2 as a reference for the Luttinger theorem and antiferromagnetism in trivalent heavy-fermion YbRh 2 Si 2

Research output: Contribution to journalArticle

Abstract

Application of the Luttinger theorem to the Kondo lattice YbRh 2 Si 2 suggests that its large 4f-derived Fermi surface (FS) in the paramagnetic (PM) regime should be similar in shape and volume to that of the divalent local-moment antiferromagnet (AFM) EuRh 2 Si 2 in its PM regime. Here we show by angle-resolved photoemission spectroscopy that paramagnetic EuRh 2 Si 2 has a large FS essentially similar to the one seen in YbRh 2 Si 2 down to 1 K. In EuRh 2 Si 2 the onset of AFM order below 24.5 K induces an extensive fragmentation of the FS due to Brillouin zone folding, intersection and resulting hybridization of the Fermi-surface sheets. Our results on EuRh 2 Si 2 indicate that the formation of the AFM state in YbRh 2 Si 2 is very likely also connected with similar changes in the FS, which have to be taken into account in the controversial analysis and discussion of anomalies observed at the quantum critical point in this system.

Details

Authors
  • M. Güttler
  • A. Generalov
  • S. I. Fujimori
  • K. Kummer
  • A. Chikina
  • S. Seiro
  • S. Danzenbächer
  • Yu M. Koroteev
  • E. V. Chulkov
  • M. Radovic
  • M. Shi
  • N. C. Plumb
  • C. Laubschat
  • J. W. Allen
  • C. Krellner
  • C. Geibel
  • D. V. Vyalikh
Organisations
External organisations
  • Dresden University of Technology
  • Japan Atomic Energy Agency
  • European Synchrotron Radiation Facility
  • Paul Scherrer Institute
  • Leibniz Institute for Solid State and Materials Research
  • Max Planck Institute for Chemical Physics of Solids
  • Tomsk State University
  • CSIC Centro de Física de Materiales (UPV/EHU)
  • Donostia International Physics Center (DIPC)
  • Saint Petersburg State University
  • University of Michigan
  • Goethe University
  • Basque Foundation for Science
  • Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Other Physics Topics
Original languageEnglish
Article number796
JournalNature Communications
Volume10
Issue number1
Publication statusPublished - 2019 Feb 15
Publication categoryResearch
Peer-reviewedYes