title: Dirac cone protected by non-symmorphic symmetry and three-dimensional Dirac line node in ZrSiS.
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.
authors.affiliation: Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany.
authors.forename: Leslie M
authors.identifier: 0000-0003-3459-4241
authors.initials: LM
authors.lastname: Schoop
authors.affiliation: Max Plank Institute for Microstructure Physics, Weinberg 2, 06120 Halle, Germany.|IBM-Almaden Research Center, 650 Harry Road, San Jose, California 95120, USA.
authors.forename: Mazhar N
authors.initials: MN
authors.lastname: Ali
authors.affiliation: Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany.
authors.forename: Carola
authors.initials: C
authors.lastname: Straßer
authors.affiliation: Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Topp
authors.affiliation: Helmholtz-Zentrum Berlin für Materialien und Energie, Elektronenspeicherring BESSY II, Albert-Einstein-Straße 15, 12489 Berlin, Germany.
authors.forename: Andrei
authors.initials: A
authors.lastname: Varykhalov
authors.affiliation: Helmholtz-Zentrum Berlin für Materialien und Energie, Elektronenspeicherring BESSY II, Albert-Einstein-Straße 15, 12489 Berlin, Germany.
authors.forename: Dmitry
authors.initials: D
authors.lastname: Marchenko
authors.affiliation: Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany.
authors.forename: Viola
authors.initials: V
authors.lastname: Duppel
authors.affiliation: Max Plank Institute for Microstructure Physics, Weinberg 2, 06120 Halle, Germany.|IBM-Almaden Research Center, 650 Harry Road, San Jose, California 95120, USA.
authors.forename: Stuart S P
authors.initials: SS
authors.lastname: Parkin
authors.affiliation: Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany.|Department of Chemistry, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, 81377 München, Germany.|Nanosystems Initiative Munich (NIM) &Center for Nanoscience, Schellingstr. 4, 80799 München, Germany.
authors.forename: Bettina V
authors.initials: BV
authors.lastname: Lotsch
authors.affiliation: Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569 Stuttgart, Germany.
authors.forename: Christian R
authors.initials: CR
authors.lastname: Ast