articlePhysical Review XMar 17, 2015GOLD OA

Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides

HWHongming WengCFChen FangZFZhong FangBAB. Andrei BernevigXDXi Dai

Chinese Academy of Sciences · Collaborative Innovation Center of Quantum Matter · +3 more institutions

Indexed inarxivcrossrefdoaj

Abstract

Based on first-principle calculations, we show that a family of nonmagnetic materials including TaAs, TaP, NbAs, and NbP are Weyl semimetals (WSM) without inversion centers. We find twelve pairs of Weyl points in the whole Brillouin zone (BZ) for each of them. In the absence of spin-orbit coupling (SOC), band inversions in mirror-invariant planes lead to gapless nodal rings in the energy-momentum dispersion. The strong SOC in these materials then opens full gaps in the mirror planes, generating nonzero mirror Chern numbers and Weyl points off the mirror planes. The resulting surface-state Fermi arc structures on both (

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Authors

5
  • HW
    Hongming WengCorresponding

    Chinese Academy of Sciences, Collaborative Innovation Center of Quantum Matter, Institute of Physics

  • CF
    Chen Fang

    Massachusetts Institute of Technology

  • ZF
    Zhong Fang

    Chinese Academy of Sciences, Collaborative Innovation Center of Quantum Matter, Institute of Physics

  • BA
    B. Andrei Bernevig

    Princeton University

  • XD
    Xi Dai

    Chinese Academy of Sciences, Collaborative Innovation Center of Quantum Matter, Institute of Physics

Topics & keywords

Topics
Keywords
  • Weyl semimetal
  • Brillouin zone
  • Semimetal
  • Gapless playback
  • Fermi Gamma-ray Space Telescope
  • Coupling (piping)
  • Inversion (geology)
  • Phase (matter)
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