Emergence of Weyl fermions by ferrimagnetism in a noncentrosymmetric magnetic Weyl semimetal

Cong Li (), Jianfeng Zhang, Yang Wang, Hongxiong Liu, Qinda Guo, Emile Rienks, Wanyu Chen, Francois Bertran, Huancheng Yang, Dibya Phuyal, Hanna Fedderwitz, Balasubramanian Thiagarajan, Maciej Dendzik, Magnus H. Berntsen, Youguo Shi, Tao Xiang and Oscar Tjernberg ()
Additional contact information
Cong Li: KTH Royal Institute of Technology
Jianfeng Zhang: Chinese Academy of Sciences
Yang Wang: KTH Royal Institute of Technology
Hongxiong Liu: Chinese Academy of Sciences
Qinda Guo: KTH Royal Institute of Technology
Emile Rienks: Elektronenspeicherring BESSY II
Wanyu Chen: KTH Royal Institute of Technology
Francois Bertran: Synchrotron SOLEIL, L’Orme des Merisiers
Huancheng Yang: Renmin University of China
Dibya Phuyal: KTH Royal Institute of Technology
Hanna Fedderwitz: Lund University
Balasubramanian Thiagarajan: Lund University
Maciej Dendzik: KTH Royal Institute of Technology
Magnus H. Berntsen: KTH Royal Institute of Technology
Youguo Shi: Chinese Academy of Sciences
Tao Xiang: Chinese Academy of Sciences
Oscar Tjernberg: KTH Royal Institute of Technology

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract Condensed matter physics has often provided a platform for investigating the interplay between particles and fields in cases that have not been observed in high-energy physics. Here, using angle-resolved photoemission spectroscopy, we provide an example of this by visualizing the electronic structure of a noncentrosymmetric magnetic Weyl semimetal candidate NdAlSi in both the paramagnetic and ferrimagnetic states. We observe surface Fermi arcs and bulk Weyl fermion dispersion as well as the emergence of new Weyl fermions in the ferrimagnetic state. Our results establish NdAlSi as a magnetic Weyl semimetal and provide an experimental observation of ferrimagnetic regulation of Weyl fermions in condensed matter.

Date: 2023
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DOI: 10.1038/s41467-023-42996-8

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