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Signature of type-II Weyl semimetal phase in MoTe2

Author

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  • J. Jiang

    (School of Physical Science and Technology, ShanghaiTech University and CAS-Shanghai Science Research Center
    University of Oxford
    Advanced Light Source, Lawrence Berkeley National Laboratory
    Pohang Accelerator Laboratory, POSTECH)

  • Z.K. Liu

    (School of Physical Science and Technology, ShanghaiTech University and CAS-Shanghai Science Research Center)

  • Y. Sun

    (Max Planck Institute for Chemical Physics of Solids)

  • H.F. Yang

    (University of Oxford
    State Key Laboratory of Functional Materials for Informatics, SIMIT, Chinese Academy of Sciences)

  • C.R. Rajamathi

    (Max Planck Institute for Chemical Physics of Solids)

  • Y.P. Qi

    (Max Planck Institute for Chemical Physics of Solids)

  • L.X. Yang

    (State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University)

  • C. Chen

    (University of Oxford)

  • H. Peng

    (University of Oxford)

  • C-C. Hwang

    (Pohang Accelerator Laboratory, POSTECH)

  • S.Z. Sun

    (Hefei Science Center, CAS and SCGY, University of Science and Technology of China)

  • S-K. Mo

    (Advanced Light Source, Lawrence Berkeley National Laboratory)

  • I. Vobornik

    (Istituto Officina dei Materiali (IOM)-CNR, Laboratorio TASC)

  • J. Fujii

    (Istituto Officina dei Materiali (IOM)-CNR, Laboratorio TASC)

  • S.S.P. Parkin

    (Max Planck Institute of Microstructure Physics)

  • C. Felser

    (Max Planck Institute for Chemical Physics of Solids)

  • B.H. Yan

    (Max Planck Institute for Chemical Physics of Solids)

  • Y.L. Chen

    (School of Physical Science and Technology, ShanghaiTech University and CAS-Shanghai Science Research Center
    University of Oxford
    State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University
    Hefei Science Center, CAS and SCGY, University of Science and Technology of China)

Abstract

Topological Weyl semimetal (TWS), a new state of quantum matter, has sparked enormous research interest recently. Possessing unique Weyl fermions in the bulk and Fermi arcs on the surface, TWSs offer a rare platform for realizing many exotic physical phenomena. TWSs can be classified into type-I that respect Lorentz symmetry and type-II that do not. Here, we directly visualize the electronic structure of MoTe2, a recently proposed type-II TWS. Using angle-resolved photoemission spectroscopy (ARPES), we unravel the unique surface Fermi arcs, in good agreement with our ab initio calculations that have nontrivial topological nature. Our work not only leads to new understandings of the unusual properties discovered in this family of compounds, but also allows for the further exploration of exotic properties and practical applications of type-II TWSs, as well as the interplay between superconductivity (MoTe2 was discovered to be superconducting recently) and their topological order.

Suggested Citation

  • J. Jiang & Z.K. Liu & Y. Sun & H.F. Yang & C.R. Rajamathi & Y.P. Qi & L.X. Yang & C. Chen & H. Peng & C-C. Hwang & S.Z. Sun & S-K. Mo & I. Vobornik & J. Fujii & S.S.P. Parkin & C. Felser & B.H. Yan & , 2017. "Signature of type-II Weyl semimetal phase in MoTe2," Nature Communications, Nature, vol. 8(1), pages 1-6, April.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms13973
    DOI: 10.1038/ncomms13973
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    Cited by:

    1. Meizhuang Liu & Jian Gou & Zizhao Liu & Zuxin Chen & Yuliang Ye & Jing Xu & Xiaozhi Xu & Dingyong Zhong & Goki Eda & Andrew T. S. Wee, 2024. "Phase-selective in-plane heteroepitaxial growth of H-phase CrSe2," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    2. Ying-Jiun Chen & Jan-Philipp Hanke & Markus Hoffmann & Gustav Bihlmayer & Yuriy Mokrousov & Stefan Blügel & Claus M. Schneider & Christian Tusche, 2022. "Spanning Fermi arcs in a two-dimensional magnet," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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