journal article·2019-06-25Open access

Electronic Transport Evidence for Topological Nodal-Line Semimetals of ZrGeSe Single Crystals

Lei Guo, Ting-Wei Chen, Chen Chen, Lei Chen, Yang Zhang, Guan-Yin Gao, Jie Yang, Xiao-Guang Li, Wei-Yao Zhao, Shuai Dong, Ren-Kui Zheng

Abstract

Although the band topology of ZrGeSe has been studied via the magnetic torque technique, the electronic transport behaviors related to the relativistic fermions in ZrGeSe are still unknown. Here, we first report systematic electronic transport properties of high-quality ZrGeSe single crystals under magnetic fields up to 14 T. Resistivity plateaus of temperature-dependent resistivity curves in both the presence and absence of magnetic fields as well as large, nonsaturating magnetoresistance in the low-temperature region were observed. By analyzing the temperature- and angular-dependent Shubnikov–de Haas oscillations and fitting it via the Lifshitz–Kosevich (LK) formula with the Berry phase being taken into account, we proved that Dirac fermions dominate the electronic transport behaviors of ZrGeSe and the presence of the nontrivial Berry phase. First-principles calculations demonstrate that ZrGeSe possesses Dirac bands and normal bands near Fermi surface, resulting in the observed magnetotransport phenomena. These results demonstrate that ZrGeSe is a topological nodal-line semimetal, which provides a fundamentally important platform to study the quantum physics of topological semimetals.
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Research context

OpenAlex topics: Topological Materials and Phenomena · 2D Materials and Applications · Graphene research and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Physics, Southeast University, Nanjing 211189, China

State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

School of Materials Science and Engineering and Jiangxi Engineering Laboratory for Advanced Functional Thin Films, Nanchang University, Nanchang 330031, China

ISEM, Innovation Campus, University of Wollongong, Wollongong, NSW 2500, Australia

Hefei National Laboratory for Physical Sciences at the Microscale, Department of Physics, and Collaborative Innovation Center of Advanced Microstructures, University of Science and Technology of China, Hefei 230026, China

Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, Jiangsu, China

Funding

Ministry of Science and Technology of the People's Republic of China · University of Wollongong · National Natural Science Foundation of China · Jiangxi Key Laboratory for Two-Dimensional Materials

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