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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, 1-8. doi:10.1038/s41567-020-01104-z.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0007-A0F9-B Version Permalink: http://hdl.handle.net/21.11116/0000-0007-DEFD-3
Genre: Journal Article

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 Creators:
Shi, Wujun1, Author              
Wieder, Benjamin J.2, Author
Meyerheim, Holger L.2, Author
Sun, Yan1, Author              
Zhang, Yang1, Author              
Li, Yiwei2, Author
Shen, Lei2, Author
Qi, Yanpeng2, Author
Yang, Lexian2, Author
Jena, Jagannath2, Author
Werner, Peter2, Author
Koepernik, Klaus2, Author
Parkin, Stuart2, Author
Chen, Yulin2, Author
Felser, Claudia3, Author              
Bernevig, B. Andrei2, Author
Wang, Zhijun2, Author
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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 Abstract: 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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Language(s): eng - English
 Dates: 2021-01-042021-01-04
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1038/s41567-020-01104-z
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Title: Nature Physics
  Other : Nat. Phys.
Source Genre: Journal
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Publ. Info: London : Nature Pub. Group
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 1 - 8 Identifier: ISSN: 1745-2473
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000025850