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  Magnetic Weyl semimetal phase in a Kagomé crystal

Liu, D. F., Liang, A. J., Liu, E. K., Xu, Q. N., Li, Y. W., Chen, C., et al. (2019). Magnetic Weyl semimetal phase in a Kagomé crystal. Science, 365(6459), 1282-1285. doi:10.1126/science.aav2873.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-B85C-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-B85E-4
Genre: Journal Article

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 Creators:
Liu, D. F.1, Author
Liang, A. J.1, Author
Liu, E. K.2, Author              
Xu, Q. N.2, Author              
Li, Y. W.1, Author
Chen, C.1, Author
Pei, D.1, Author
Shi, W. J.1, Author
Mo, S. K.1, Author
Dudin, P.1, Author
Kim, T.1, Author
Cacho, C.1, Author
Li, G.1, Author
Sun, Y.1, Author
Yang, L. X.1, Author
Liu, Z. K.1, Author
Parkin, S. S. P.1, Author
Felser, Claudia3, Author              
Chen, Y. L.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: Weyl semimetals (WSMs)—}materials that host exotic quasiparticles called Weyl fermions{—must break either spatial inversion or time-reversal symmetry. A number of WSMs that break inversion symmetry have been identified, but showing unambiguously that a material is a time-reversal-breaking WSM is tricky. Three groups now provide spectroscopic evidence for this latter state in magnetic materials (see the Perspective by da Silva Neto). Belopolski et al. probed the material Co2MnGa using angle-resolved photoemission spectroscopy, revealing exotic drumhead surface states. Using the same technique, Liu et al. studied the material Co3Sn2S2, which was complemented by the scanning tunneling spectroscopy measurements of Morali et al. These magnetic WSM states provide an ideal setting for exotic transport effects.Science, this issue p. 1278, p. 1282, p. 1286; see also p. 1248Weyl semimetals are crystalline solids that host emergent relativistic Weyl fermions and have characteristic surface Fermi-arcs in their electronic structure. Weyl semimetals with broken time reversal symmetry are difficult to identify unambiguously. In this work, using angle-resolved photoemission spectroscopy, we visualized the electronic structure of the ferromagnetic crystal Co3Sn2S2 and discovered its characteristic surface Fermi-arcs and linear bulk band dispersions across the Weyl points. These results establish Co3Sn2S2 as a magnetic Weyl semimetal that may serve as a platform for realizing phenomena such as chiral magnetic effects, unusually large anomalous Hall effect and quantum anomalous Hall effect.

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Language(s): eng - English
 Dates: 2019-09-202019-09-20
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1126/science.aav2873
BibTex Citekey: Liu1282
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Title: Science
  Other : Science
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Association for the Advancement of Science
Pages: - Volume / Issue: 365 (6459) Sequence Number: - Start / End Page: 1282 - 1285 Identifier: ISSN: 0036-8075
CoNE: https://pure.mpg.de/cone/journals/resource/991042748276600_1