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  A charge-density-wave topological semimetal

Shi, W., Wieder, B. J., Meyerheim, H. L., Sun, Y., Zhang, Y., Li, Y., et al. (2021). A charge-density-wave topological semimetal. Nature Physics, 17, 381-387. doi:10.1038/s41567-020-01104-z.

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Shi, Wujun1, Autor           
Wieder, Benjamin J.2, Autor
Meyerheim, Holger L.2, Autor
Sun, Yan1, Autor           
Zhang, Yang1, Autor           
Li, Yiwei2, Autor
Shen, Lei2, Autor
Qi, Yanpeng2, Autor
Yang, Lexian2, Autor
Jena, Jagannath2, Autor
Werner, Peter2, Autor
Koepernik, Klaus2, Autor
Parkin, Stuart2, Autor
Chen, Yulin2, Autor
Felser, Claudia3, Autor           
Bernevig, B. Andrei2, Autor
Wang, Zhijun2, Autor
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2External Organizations, ou_persistent22              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Zusammenfassung: Topological physics and strong electron–electron correlations in quantum materials are typically studied independently. However, there have been rapid recent developments in quantum materials in which topological phase transitions emerge when the single-particle band structure is modified by strong interactions. Here we demonstrate that the room-temperature phase of (TaSe4)2I is a Weyl semimetal with 24 pairs of Weyl nodes. Owing to its quasi-one-dimensional structure, (TaSe4)2I also hosts an established charge-density wave instability just below room temperature. We show that the charge-density wave in (TaSe4)2I couples the bulk Weyl points and opens a bandgap. The correlation-driven topological phase transition in (TaSe4)2I provides a route towards observing condensed-matter realizations of axion electrodynamics in the gapped regime, topological chiral response effects in the semimetallic phase, and represents an avenue for exploring the interplay of correlations and topology in a solid-state material.

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Sprache(n): eng - English
 Datum: 2021-01-042021-01-04
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1038/s41567-020-01104-z
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Titel: Nature Physics
  Andere : Nat. Phys.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: London : Nature Pub. Group
Seiten: - Band / Heft: 17 Artikelnummer: - Start- / Endseite: 381 - 387 Identifikator: ISSN: 1745-2473
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000025850