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De Haas-van Alphen study on three-dimensional topological semimetal pyrite PtBi2
Wenshuai Gao1, Xiangde Zhu2, Jin Hu3
1Institute of Physical Science and Information Technology, School of Physics and Materials Science, Anhui University, Hefei 230601, China; Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China; Department of Physics, University of Science and Technology of China, Hefei 230026, China.
Abstract:
We present the systematic de Haas-van Alphen (dHvA) quantum oscillations studies on the recently discovered topological Dirac semimetal pyrite PtBi2 single crystals. Remarkable dHvA oscillations are emerged at a low field about 1.5 T. From the analyses of the dHvA oscillations, we extract the high quantum mobilities, light effective masses and phase shift factors for the Dirac fermions in pyrite PtBi2. From the angular dependence of the dHvA oscillations, we map out the topology of the Fermi surface. Furthermore, we identify two additional oscillation frequencies that are not probed by the SdH oscillations, which provides us with opportunities to further understand its Fermi surface topology.
