Time-reversal symmetry breaking type-II Weyl state in YbMnBi2

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Sergey Borisenko - , Leibniz Institute for Solid State and Materials Research Dresden (Author)
  • Daniil Evtushinsky - , Leibniz Institute for Solid State and Materials Research Dresden, Swiss Federal Institute of Technology Lausanne (EPFL) (Author)
  • Quinn Gibson - , Princeton University, University of Liverpool (UOL) (Author)
  • Alexander Yaresko - , Max Planck Institute for Solid State Research (Author)
  • Klaus Koepernik - , Leibniz Institute for Solid State and Materials Research Dresden (Author)
  • Timur Kim - , Diamond Light Source (Author)
  • Mazhar Ali - , Princeton University (Author)
  • Jeroen van den Brink - , Clusters of Excellence ct.qmat: Complexity and Topology in Quantum Matter, Chair of Solid State Theory, Leibniz Institute for Solid State and Materials Research Dresden (Author)
  • Moritz Hoesch - , Diamond Light Source, German Electron Synchrotron (DESY) (Author)
  • Alexander Fedorov - , Leibniz Institute for Solid State and Materials Research Dresden (Author)
  • Erik Haubold - , Chair of Experimental Solid State Physics, Leibniz Institute for Solid State and Materials Research Dresden (Author)
  • Yevhen Kushnirenko - , Chair of Experimental Solid State Physics, Leibniz Institute for Solid State and Materials Research Dresden (Author)
  • Ivan Soldatov - , Leibniz Institute for Solid State and Materials Research Dresden, Ural Federal University (Author)
  • Rudolf Schäfer - , Leibniz Institute for Solid State and Materials Research Dresden (Author)
  • Robert J. Cava - , Princeton University (Author)

Abstract

Spectroscopic detection of Dirac and Weyl fermions in real materials is vital for both, promising applications and fundamental bridge between high-energy and condensed-matter physics. While the presence of Dirac and noncentrosymmetric Weyl fermions is well established in many materials, the magnetic Weyl semimetals still escape direct experimental detection. In order to find a time-reversal symmetry breaking Weyl state we design two materials and present here experimental and theoretical evidence of realization of such a state in one of them, YbMnBi2. We model the time-reversal symmetry breaking observed by magnetization and magneto-optical microscopy measurements by canted antiferromagnetism and find a number of Weyl points. Using angle-resolved photoemission, we directly observe two pairs of Weyl points connected by the Fermi arcs. Our results not only provide a fundamental link between the two areas of physics, but also demonstrate the practical way to design novel materials with exotic properties.

Details

Original languageEnglish
Article number3424
JournalNature communications
Volume10
Issue number1
Publication statusPublished - 1 Dec 2019
Peer-reviewedYes

External IDs

PubMed 31366883