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Chiral fermion reversal in chiral crystals

Author

Listed:
  • Hang Li

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Sheng Xu

    (Renmin University of China)

  • Zhi-Cheng Rao

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Li-Qin Zhou

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Zhi-Jun Wang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Shi-Ming Zhou

    (University of Science and Technology of China)

  • Shang-Jie Tian

    (Renmin University of China)

  • Shun-Ye Gao

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Jia-Jun Li

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Yao-Bo Huang

    (Chinese Academy of Sciences)

  • He-Chang Lei

    (Renmin University of China)

  • Hong-Ming Weng

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Yu-Jie Sun

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Tian-Long Xia

    (Renmin University of China)

  • Tian Qian

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

  • Hong Ding

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory)

Abstract

In materials chiral fermions such as Weyl fermions are characterized by nonzero chiral charges, which are singular points of Berry curvature in momentum space. Recently, new types of chiral fermions beyond Weyl fermions have been discovered in structurally chiral crystals CoSi, RhSi and PtAl. Here, we have synthesized RhSn single crystals, which have opposite structural chirality to the CoSi crystals we previously studied. Using angle-resolved photoemission spectroscopy, we show that the bulk electronic structures of RhSn are consistent with the band calculations and observe evident surface Fermi arcs and helical surface bands, confirming the existence of chiral fermions in RhSn. It is noteworthy that the helical surface bands of the RhSn and CoSi crystals have opposite handedness, meaning that the chiral fermions are reversed in the crystals of opposite structural chirality. Our discovery establishes a direct connection between chiral fermions in momentum space and chiral lattices in real space.

Suggested Citation

  • Hang Li & Sheng Xu & Zhi-Cheng Rao & Li-Qin Zhou & Zhi-Jun Wang & Shi-Ming Zhou & Shang-Jie Tian & Shun-Ye Gao & Jia-Jun Li & Yao-Bo Huang & He-Chang Lei & Hong-Ming Weng & Yu-Jie Sun & Tian-Long Xia , 2019. "Chiral fermion reversal in chiral crystals," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-13435-4
    DOI: 10.1038/s41467-019-13435-4
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    Cited by:

    1. Geng Li & Haitao Yang & Peijie Jiang & Cong Wang & Qiuzhen Cheng & Shangjie Tian & Guangyuan Han & Chengmin Shen & Xiao Lin & Hechang Lei & Wei Ji & Ziqiang Wang & Hong-Jun Gao, 2022. "Chirality locking charge density waves in a chiral crystal," Nature Communications, Nature, vol. 13(1), pages 1-7, December.

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