Discovery of a Magnetic Topological Semimetal Eu3In2As4 with a Single Pair of Weyl Points

• DOI: 10.48550/arxiv.2403.07637
• Publication Date: 2024-03-12
• Authors: Ke Jia; Jingyu Yao; Xiaobo He; Yupeng Li; Junze Deng; Ming Yang; Junfeng Wang; Zengwei Zhu; Cuixiang Wang; Dayu Yan; Hai L. Feng; Jie Shen; Yongkang Luo; Zhijun Wang; Youguo Shi
• Keywords: Weyl semimetal

Magnetic Weyl semimetal (MWS) is a unique topological state with open surface Fermi arc states and other exotic transport phenomena. However, most reported MWSs show multiple pairs of points complicated surfaces, which increases the difficulty investigation into intrinsic chiral property. In this wor, we successfully synthesized soft magnetic Eu3In2As4 single pair under fields. The Shubnikov de Haas (SdH) oscillation frequency, as well linear hall resistance same carrier density, observed up to 50 Tesla, indicating around level massless fermion (m* = 0.121 m0, Berry phase). Such further confirmed by density functional theory calculations. ordering band topology can be easily tuned external field. field-induced MWS good platform detect properties, including possible quantum anomalous Hall effect.