Topological electronic state and anisotropic Fermi surface in half-Heusler GdPtBi

Junli Zhang, Jie Chen, Peng Li, Chenhui Zhang, Zhipeng Hou, Yan Wen, Qiang Zhang, Wenhong Wang, Xixiang Zhang

Research output: Contribution to journalArticlepeer-review

Abstract

Half-Heusler alloys possess unique and desirable physical properties due to their thermoelectricity, magnetism, superconductivity, and weak antilocalization effects. These properties have become of particular interest since the recent discovery of topological Weyl semimetal state for which the electronic bands are dispersed linearly around one pair of Weyl nodes, with opposite chirality (i.e., chiral anomaly). Here, we report the transport signatures of topological electronic state in a half-Heusler GdPtBi single crystal. We show that the non-trivial π Berry phase, negative magnetoresistance and giant planner Hall effect arise from the chiral anomaly and that the Shubnikov-de Haas oscillation frequency in GdPtBi is angle-dependent with an anisotropic Fermi surface (FS). All transport signatures not only demonstrate the topological electronic state in half-Heusler GdPtBi crystals, but also describe the shape of the anisotropy FS.

Original languageEnglish (US)
Article number355707
JournalJournal of Physics Condensed Matter
Volume32
Issue number35
DOIs
StatePublished - Aug 19 2020

Keywords

  • Fermi surface
  • Weyl semimetal
  • chiral anomaly
  • half-Heusler alloy
  • non-trivial Berry phase
  • topological

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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