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  • Title: Topological nature of the node-arc semimetal PtSn4 probed by de Haas-van Alphen quantum oscillations.
    Author: Wang YJ, Liang DD, Ge M, Yang J, Gong JX, Luo L, Pi L, Zhu WK, Zhang CJ, Zhang YH.
    Journal: J Phys Condens Matter; 2018 Apr 18; 30(15):155701. PubMed ID: 29480806.
    Abstract:
    Dirac node arc semimetal state is a new topological quantum state which is proposed to exist in PtSn4 (Wu et al 2016 Dirac node arcs in PtSn4 Nat. Phys. 12 667-71). We present a systematic de Haas-van Alphen quantum oscillation study on this compound. Two intriguing oscillation branches, i.e. F 1 and F 2, are detected in the fast Fourier transformation spectra, both of which are characterized to possess tiny effective mass and ultrahigh quantum mobility. And the F 2 branch exhibits an angle-dependent nontrivial Berry phase. The features are consistent with the existence of the node arc semimetal state and shed new light on its complicated Fermi surfaces and topological nature.
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