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  Pressure-induced a partial disorder and superconductivity in quasi-one-dimensional Weyl semimetal (NbSe4)2I

Pei, C., Shi, W., Zhao, Y., Gao, L., Gao, J., Li, Y., et al. (2021). Pressure-induced a partial disorder and superconductivity in quasi-one-dimensional Weyl semimetal (NbSe4)2I. Materials Today Physics, 21: 100509, pp. 1-7. doi:10.1016/j.mtphys.2021.100509.

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Pei, C.1, Author
Shi, W.1, Author
Zhao, Y.1, Author
Gao, L.1, Author
Gao, J.1, Author
Li, Y.1, Author
Zhu, H.1, Author
Zhang, Q.1, Author
Yu, N.1, Author
Li, C.1, Author
Cao, W.1, Author
Medvedev, S. A.2, Author              
Felser, C.3, Author              
Yan, B.1, Author
Liu, Z.1, Author
Chen, Y.1, Author
Wang, Z.1, Author
Qi, Y.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Sergiy Medvediev, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863438              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: A search for the single material system that simultaneously exhibits topological phase and intrinsic superconductivity has been largely limited, although such a system is far more favorable especially for the quantum device applications. Except artificially engineered topological superconductivity in heterostructure systems, another alternative is to have superconductivity arising from the topological materials by pressure or other "clean" technology. Here, based on first-principles calculations, we first show that quasi-one-dimensional compound (NbSe4)(2)I represents a rare example of a chiral Weyl semimetal in which the set of symmetry-related Weyl points (WPs) exhibit the same chiral charge at a certain energy. The net chiral charge (NCC) of the below Fermi level E-F (or a certain energy) can be tuned by pressure. In addition, a partial disorder induced by pressure accompanied with superconductivity emerges. Although amorphization of the iodine sub-lattice under high pressure, the one-dimensional NbSe4 chains in (NbSe4)(2)I remain intact and provide a superconducting channel in one dimension. Our combined theoretical and experimental research provide critical insight into a new phase of the one-dimensional system, in which distinctive phase transitions and correlated topological states emerge upon compression. (C) 2021 Elsevier Ltd. All rights reserved.

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Language(s): eng - English
 Dates: 2021-08-212021-08-21
 Publication Status: Published in print
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Title: Materials Today Physics
  Abbreviation : Mater. Today Phys.
Source Genre: Journal
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Publ. Info: Amsterdam, The Netherlands : Elsevier
Pages: - Volume / Issue: 21 Sequence Number: 100509 Start / End Page: 1 - 7 Identifier: ISSN: 2542-5293
CoNE: https://pure.mpg.de/cone/journals/resource/2542-5293