Possible pressure-induced topological quantum phase transition in the nodal line semimetal ZrSiS

Academic Article

Abstract

  • ZrSiS has recently gained attention due to its unusual electronic properties: nearly perfect electron-hole compensation, large, anisotropic magnetoresistance, multiple Dirac nodes near the Fermi level, and an extremely large range of linear dispersion of up to ∼2 eV. We carried out a series of high pressure electrical resistivity measurements on single crystals of ZrSiS. Shubnikov-de Haas measurements show two distinct oscillation frequencies. For the smaller orbit, we observe a change in the phase of ∼0.5, which occurs between 0.16-0.5 GPa. This change in phase is accompanied by an abrupt decrease of the cross-sectional area of this Fermi surface. We attribute this change in phase to a possible topological quantum phase transition. The phase of the larger orbit exhibits a Berry phase of π and remains roughly constant up to ∼2.3 GPa. Resistivity measurements to higher pressures show no evidence for pressure-induced superconductivity to at least ∼20 GPa.
  • Authors

    Published In

  • Physical Review B  Journal
  • Digital Object Identifier (doi)

    Author List

  • Vangennep D; Paul TA; Yerger CW; Weir ST; Vohra YK; Hamlin JJ
  • Volume

  • 99
  • Issue

  • 8