Dirac cone protected by non-symmorphic symmetry and three-dimensional Dirac line node in ZrSiS

Leslie M. Schoop, Mazhar N. Ali, Carola Straßer, Andreas Topp, Andrei Varykhalov, Dmitry Marchenko, Viola Duppel, Stuart S.P. Parkin, Bettina V. Lotsch, Christian R. Ast

Research output: Contribution to journalArticlepeer-review

344 Scopus citations

Abstract

Materials harbouring exotic quasiparticles, such as massless Dirac and Weyl fermions, have garnered much attention from physics and material science communities due to their exceptional physical properties such as ultra-high mobility and extremely large magnetoresistances. Here, we show that the highly stable, non-toxic and earth-abundant material, ZrSiS, has an electronic band structure that hosts several Dirac cones that form a Fermi surface with a diamond-shaped line of Dirac nodes. We also show that the square Si lattice in ZrSiS is an excellent template for realizing new types of two-dimensional Dirac cones recently predicted by Young and Kane. Finally, we find that the energy range of the linearly dispersed bands is as high as 2 eV above and below the Fermi level; much larger than of other known Dirac materials. This makes ZrSiS a very promising candidate to study Dirac electrons, as well as the properties of lines of Dirac nodes.

Original languageEnglish (US)
Article number11696
JournalNature communications
Volume7
DOIs
StatePublished - May 31 2016

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Dirac cone protected by non-symmorphic symmetry and three-dimensional Dirac line node in ZrSiS'. Together they form a unique fingerprint.

Cite this