Enhanced electron correlations in the new binary stannide PdSn4: a homologue of the Dirac nodal arc semimetal PtSn4

作     者：Xu, C.Q. Zhou, W. Sankar, R. Xing, X.Z. Shi, Z.X. Han, Z.D. Qian, B. Wang, J.H. Zhu, Zengwei Zhang, J.L. Bangura, A.F. Hussey, N.E. Xu, Xiaofeng 

作者机构：Advanced Functional Materials Lab Department of Physics Changshu Institute of Technology Changshu215500 China Department of Physics Hangzhou Normal University Hangzhou310036 China Center for Condensed Matter Sciences National Taiwan University Taipei10617 Taiwan School of Physics Key Laboratory of MEMS of the Ministry of Education Southeast University Nanjing211189 China Wuhan National High Magnetic Field Center School of Physics Huazhong University of Science and Technology Wuhan430074 China High Magnetic Field Laboratory Chinese Academy of Sciences Hefei230031 China Max-Planck-Institut fur Festkorperforschung Heisenbergstr. 1 StuttgartD-70569 Germany  Radboud University Toernooiveld 7 Nijmegen6525ED Netherlands 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2017年

核心收录：

主　　题：Binary alloys 

摘      要：The advent of nodal-line semi-metals, i.e. systems in which the conduction and valence bands cross each other along a closed trajectory (line or loop) inside the Brillouin zone, has opened up a new arena for the exploration of topological condensed matter in which, due to a vanishing density of states near the Fermi level, electron correlation effects may also play an important role. In spite of this conceptual richness however, material realization of nodal-line (loop) fermions is rare, with PbTaSe2, ZrSiS and PtSn4 the only promising known candidates. Here we report the synthesis and physical properties of a new compound PdSn4 that is isostructural with PtSn4 yet possesses quasiparticles with significantly enhanced effective masses. In addition, PdSn4 displays an unusual polar angular magnetoresistance which at a certain field orientation, varies linearly with field up to 55 Tesla. Our study suggests that, in association with its homologue PtSn4 whose low-lying excitations were recently claimed to possess Dirac node arcs, PdSn4 may be a promising candidate in the search for novel topological states with enhanced correlation effects. Copyright © 2017, The Authors. All rights reserved.