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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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Liu, D. F.1, Autor
Liang, A. J.1, Autor
Liu, E. K.2, Autor           
Xu, Q. N.2, Autor           
Li, Y. W.1, Autor
Chen, C.1, Autor
Pei, D.1, Autor
Shi, W. J.1, Autor
Mo, S. K.1, Autor
Dudin, P.1, Autor
Kim, T.1, Autor
Cacho, C.1, Autor
Li, G.1, Autor
Sun, Y.1, Autor
Yang, L. X.1, Autor
Liu, Z. K.1, Autor
Parkin, S. S. P.1, Autor
Felser, Claudia3, Autor           
Chen, Y. L.1, Autor
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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 Zusammenfassung: 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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Sprache(n): eng - English
 Datum: 2019-09-202019-09-20
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Identifikatoren: DOI: 10.1126/science.aav2873
BibTex Citekey: Liu1282
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Titel: Science
  Andere : Science
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Washington, D.C. : American Association for the Advancement of Science
Seiten: - Band / Heft: 365 (6459) Artikelnummer: - Start- / Endseite: 1282 - 1285 Identifikator: ISSN: 0036-8075
CoNE: https://pure.mpg.de/cone/journals/resource/991042748276600_1