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  Signature of type-II Weyl semimetal phase in MoTe2

Jiang, J., Liu, Z. K., Sun, Y., Yang, H. F., Rajamathi, C. R., Qi, Y. P., et al. (2017). Signature of type-II Weyl semimetal phase in MoTe2. Nature Communications, 8: 13973. doi:10.1038/ncomms13973.

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https://doi.org/10.1038/ncomms13973 (Publisher version)
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 Creators:
Jiang, J.1, Author
Liu, Z. K.1, Author
Sun, Y.1, Author
Yang, H. F.1, Author
Rajamathi, C. R.1, Author
Qi, Y. P.1, Author
Yang, L. X.1, Author
Chen, C.1, Author
Peng, H.1, Author
Hwang, C. C.1, Author
Sun, S. Z.1, Author
Mo, S. K.1, Author
Vobornik, I.1, Author
Fujii, J.1, Author
Parkin, S. S. P.2, Author              
Felser, C.1, Author
Yan, B. H.1, Author
Chen, Y. L.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society, ou_3287476              

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 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.

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 Dates: 2017-01-13
 Publication Status: Published online
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 Identifiers: BibTex Citekey: P13171
DOI: 10.1038/ncomms13973
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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 8 Sequence Number: 13973 Start / End Page: - Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723