Topological nature of the node-arc semimetal PtSn4 probed by de Haas-van Alphen quantum oscillations

• Published in: Journal of physics. Condensed matter Vol. 30; no. 15; p. 155701
• Main Authors: Wang, Y J, Liang, D D, Ge, M, Yang, J, Gong, J X, Luo, L, Pi, L, Zhu, W K, Zhang, C J, Zhang, Y H
• Format: Journal Article
• Language: English
• Published: IOP Publishing 18.04.2018
• Subjects: de Haas-van Alphen; node arc semimetal; topological nature
• ISSN: 0953-8984; 1361-648X
• DOI: 10.1088/1361-648X/aab254

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. F1 and F2, are detected in the fast Fourier transformation spectra, both of which are characterized to possess tiny effective mass and ultrahigh quantum mobility. And the F2 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.