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Lorentz-violating type-II Dirac fermions in transition metal dichalcogenide PtTe2

Author

Listed:
  • Mingzhe Yan

    (Tsinghua University)

  • Huaqing Huang

    (Tsinghua University)

  • Kenan Zhang

    (Tsinghua University)

  • Eryin Wang

    (Tsinghua University)

  • Wei Yao

    (Tsinghua University)

  • Ke Deng

    (Tsinghua University)

  • Guoliang Wan

    (Tsinghua University)

  • Hongyun Zhang

    (Tsinghua University)

  • Masashi Arita

    (Hiroshima University)

  • Haitao Yang

    (Tsinghua University
    Tsinghua University)

  • Zhe Sun

    (University of Science and Technology of China)

  • Hong Yao

    (Tsinghua University
    Collaborative Innovation Center of Quantum Matter)

  • Yang Wu

    (Tsinghua University)

  • Shoushan Fan

    (Tsinghua University
    Tsinghua University
    Collaborative Innovation Center of Quantum Matter)

  • Wenhui Duan

    (Tsinghua University
    Collaborative Innovation Center of Quantum Matter)

  • Shuyun Zhou

    (Tsinghua University
    Collaborative Innovation Center of Quantum Matter)

Abstract

Topological semimetals have recently attracted extensive research interests as host materials to condensed matter physics counterparts of Dirac and Weyl fermions originally proposed in high energy physics. Although Lorentz invariance is required in high energy physics, it is not necessarily obeyed in condensed matter physics, and thus Lorentz-violating type-II Weyl/Dirac fermions could be realized in topological semimetals. The recent realization of type-II Weyl fermions raises the question whether their spin-degenerate counterpart—type-II Dirac fermions—can be experimentally realized too. Here, we report the experimental evidence of type-II Dirac fermions in bulk stoichiometric PtTe2 single crystal. Angle-resolved photoemission spectroscopy measurements and first-principles calculations reveal a pair of strongly tilted Dirac cones along the Γ-A direction, confirming PtTe2 as a type-II Dirac semimetal. Our results provide opportunities for investigating novel quantum phenomena (e.g., anisotropic magneto-transport) and topological phase transition.

Suggested Citation

  • Mingzhe Yan & Huaqing Huang & Kenan Zhang & Eryin Wang & Wei Yao & Ke Deng & Guoliang Wan & Hongyun Zhang & Masashi Arita & Haitao Yang & Zhe Sun & Hong Yao & Yang Wu & Shoushan Fan & Wenhui Duan & Sh, 2017. "Lorentz-violating type-II Dirac fermions in transition metal dichalcogenide PtTe2," Nature Communications, Nature, vol. 8(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-00280-6
    DOI: 10.1038/s41467-017-00280-6
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    Cited by:

    1. Jack Howard & Alexander Rodriguez & Neel Haldolaarachchige & Kalani Hettiarachchilage, 2023. "First Principles Computation of New Topological B 2 X 2 Zn ( X = Ir, Rh, Co) Compounds," J, MDPI, vol. 6(1), pages 1-12, February.
    2. Fei Wang & Yang Zhang & Zhijie Wang & Haoxiong Zhang & Xi Wu & Changhua Bao & Jia Li & Pu Yu & Shuyun Zhou, 2023. "Ionic liquid gating induced self-intercalation of transition metal chalcogenides," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    3. Jack Howard & Joshua Steier & Neel Haldolaarachchige & Kalani Hettiarachchilage, 2021. "Computational Prediction of New Series of Topological Ternary Compounds La X S ( X = Si, Ge, Sn) from First-Principles," J, MDPI, vol. 4(4), pages 1-12, September.
    4. Zhongqiang Chen & Hongsong Qiu & Xinjuan Cheng & Jizhe Cui & Zuanming Jin & Da Tian & Xu Zhang & Kankan Xu & Ruxin Liu & Wei Niu & Liqi Zhou & Tianyu Qiu & Yequan Chen & Caihong Zhang & Xiaoxiang Xi &, 2024. "Defect-induced helicity dependent terahertz emission in Dirac semimetal PtTe2 thin films," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    5. Jing-Wen Hsueh & Lai-Hsiang Kuo & Po-Han Chen & Wan-Hsin Chen & Chi-Yao Chuang & Chia-Nung Kuo & Chin-Shan Lue & Yu-Ling Lai & Bo-Hong Liu & Chia-Hsin Wang & Yao-Jane Hsu & Chun-Liang Lin & Jyh-Pin Ch, 2024. "Investigating the role of undercoordinated Pt sites at the surface of layered PtTe2 for methanol decomposition," Nature Communications, Nature, vol. 15(1), pages 1-13, December.

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