Magnetism-induced topological transition in EuAs3

Erjian Cheng, Wei Xia, Xianbiao Shi, Hongwei Fang, Chengwei Wang, Chuanying Xi, Shaowen Xu, Darren C. Peets, Linshu Wang, Hao Su, Li Pi, Wei Ren, Xia Wang, Na Yu, Yulin Chen, Weiwei Zhao, Zhongkai Liu (), Yanfeng Guo () and Shiyan Li ()
Additional contact information
Erjian Cheng: Fudan University
Wei Xia: ShanghaiTech University
Xianbiao Shi: Harbin Institute of Technology
Hongwei Fang: ShanghaiTech University
Chengwei Wang: ShanghaiTech University
Chuanying Xi: High Magnetic Field Laboratory of the Chinese Academy of Sciences
Shaowen Xu: Shanghai University
Darren C. Peets: Chinese Academy of Sciences
Linshu Wang: Fudan University
Hao Su: ShanghaiTech University
Li Pi: High Magnetic Field Laboratory of the Chinese Academy of Sciences
Wei Ren: Shanghai University
Xia Wang: ShanghaiTech University
Na Yu: ShanghaiTech University
Yulin Chen: ShanghaiTech University
Weiwei Zhao: Harbin Institute of Technology
Zhongkai Liu: ShanghaiTech University
Yanfeng Guo: ShanghaiTech University
Shiyan Li: Fudan University

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: Abstract The nature of the interaction between magnetism and topology in magnetic topological semimetals remains mysterious, but may be expected to lead to a variety of novel physics. We systematically studied the magnetic semimetal EuAs3, demonstrating a magnetism-induced topological transition from a topological nodal-line semimetal in the paramagnetic or the spin-polarized state to a topological massive Dirac metal in the antiferromagnetic ground state at low temperature. The topological nature in the antiferromagnetic state and the spin-polarized state has been verified by electrical transport measurements. An unsaturated and extremely large magnetoresistance of ~2 × 105% at 1.8 K and 28.3 T is observed. In the paramagnetic states, the topological nodal-line structure at the Y point is proven by angle-resolved photoemission spectroscopy. Moreover, a temperature-induced Lifshitz transition accompanied by the emergence of a new band below 3 K is revealed. These results indicate that magnetic EuAs3 provides a rich platform to explore exotic physics arising from the interaction of magnetism with topology.

Date: 2021
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DOI: 10.1038/s41467-021-26482-7

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