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

Author

Listed:
  • Cong Li

    (KTH Royal Institute of Technology
    Stanford University)

  • 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)

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.

Suggested Citation

  • Cong Li & Jianfeng Zhang & Yang Wang & Hongxiong Liu & Qinda Guo & Emile Rienks & Wanyu Chen & Francois Bertran & Huancheng Yang & Dibya Phuyal & Hanna Fedderwitz & Balasubramanian Thiagarajan & Macie, 2023. "Emergence of Weyl fermions by ferrimagnetism in a noncentrosymmetric magnetic Weyl semimetal," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42996-8
    DOI: 10.1038/s41467-023-42996-8
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