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  • Title: Evidence for a Dirac nodal-line semimetal in SrAs3.
    Author: Li S, Guo Z, Fu D, Pan XC, Wang J, Ran K, Bao S, Ma Z, Cai Z, Wang R, Yu R, Sun J, Song F, Wen J.
    Journal: Sci Bull (Beijing); 2018 May 15; 63(9):535-541. PubMed ID: 36658839.
    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.
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