Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Noam Morali - , Weizmann Institute of Science (Author)
  • Rajib Batabyal - , Weizmann Institute of Science (Author)
  • Pranab Kumar Nag - , Weizmann Institute of Science (Author)
  • Enke Liu - , Max Planck Institute for Chemical Physics of Solids, CAS - Institute of Physics (Author)
  • Qiunan Xu - , Max Planck Institute for Chemical Physics of Solids (Author)
  • Yan Sun - , Max Planck Institute for Chemical Physics of Solids (Author)
  • Binghai Yan - , Weizmann Institute of Science (Author)
  • Claudia Felser - , Max Planck Institute for Chemical Physics of Solids, Harvard University (Author)
  • Nurit Avraham - , Weizmann Institute of Science (Author)
  • Haim Beidenkopf - , Weizmann Institute of Science (Author)

Abstract

Bulk-surface correspondence in Weyl semimetals ensures the formation of topological "Fermi arc" surface bands whose existence is guaranteed by bulk Weyl nodes. By investigating three distinct surface terminations of the ferromagnetic semimetal Co3Sn2S2, we verify spectroscopically its classification as a time-reversal symmetry-broken Weyl semimetal. We show that the distinct surface potentials imposed by three different terminations modify the Fermi-arc contour and Weyl node connectivity. On the tin (Sn) surface, we identify intra-Brillouin zone Weyl node connectivity of Fermi arcs, whereas on cobalt (Co) termination, the connectivity is across adjacent Brillouin zones. On the sulfur (S) surface, Fermi arcs overlap with nontopological bulk and surface states.We thus resolve both topologically protected and nonprotected electronic properties of a Weyl semimetal.

Details

Original languageEnglish
Pages (from-to)1286-1291
Number of pages6
JournalScience
Volume365
Issue number6459
Publication statusPublished - 20 Sept 2019
Peer-reviewedYes

External IDs

PubMed 31604237

Keywords

ASJC Scopus subject areas