Evidence for a Dirac nodal-line semimetal in SrAs3

Shichao Li, Zhaopeng Guo, Dongzhi Fu, Xing Chen Pan, Jinghui Wang, Kejing Ran, Song Bao, Zhen Ma, Zhengwei Cai, Rui Wang, Rui Yu, Jian Sun, Fengqi Song, Jinsheng Wen

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Dirac nodal-line semimetals with the linear bands crossing along a line or loop, represent a new topological state of matter. Here, by carrying out magnetotransport measurements and performing first-principle calculations, we demonstrate that such a state has been realized in high-quality single crystals of SrAs3. We obtain the nontrivial π Berry phase by analysing the Shubnikov-de Haas quantum oscillations. We also observe a robust negative longitudinal magnetoresistance induced by the chiral anomaly. Accompanying first-principles calculations identifies that a single hole pocket enclosing the loop nodes is responsible for these observations.

Original languageEnglish
Pages (from-to)535-541
Number of pages7
JournalScience Bulletin
Volume63
Issue number9
DOIs
Publication statusPublished - 2018 May 15
Externally publishedYes

Keywords

  • Berry phase
  • Chiral anomaly
  • DFT calculations
  • Dirac nodal-line semimetal
  • Magnetoresistance
  • Quantum oscillations

ASJC Scopus subject areas

  • General

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