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  Weyl-like points from band inversions of spin-polarised surface states in NbGeSb

Marković, I., Hooley, C. A., Clark, O. J., Mazzola, F., Watson, M. D., Riley, J. M., et al. (2019). Weyl-like points from band inversions of spin-polarised surface states in NbGeSb. Nature Communications, 10(1): 5485, pp. 1-8. doi:10.1038/s41467-019-13464-z.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-5F49-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-7006-6
Genre: Journal Article

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 Creators:
Marković, I.1, Author              
Hooley, C. A.2, Author
Clark, O. J.2, Author
Mazzola, F.2, Author
Watson, M. D.2, Author
Riley, J. M.2, Author
Volckaert, K.2, Author
Underwood, K.2, Author
Dyer, M. S.2, Author
Murgatroyd, P. A. E.2, Author
Murphy, K. J.2, Author
Le Fèvre, P. 2, Author
Bertran, F.2, Author
Fujii, J.2, Author
Vobornik, I.2, Author
Wu, S.2, Author
Okuda, T.2, Author
Alaria, J.2, Author
King, P. D. C.2, Author
Affiliations:
1Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
2External Organizations, ou_persistent22              

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 Abstract: Band inversions are key to stabilising a variety of novel electronic states in solids, from topological surface states to the formation of symmetry-protected three-dimensional Dirac and Weyl points and nodal-line semimetals. Here, we create a band inversion not of bulk states, but rather between manifolds of surface states. We realise this by aliovalent substitution of Nb for Zr and Sb for S in the ZrSiS family of nonsymmorphic semimetals. Using angle-resolved photoemission and density-functional theory, we show how two pairs of surface states, known from ZrSiS, are driven to intersect each other near the Fermi level in NbGeSb, and to develop pronounced spin splittings. We demonstrate how mirror symmetry leads to protected crossing points in the resulting spin-orbital entangled surface band structure, thereby stabilising surface state analogues of three-dimensional Weyl points. More generally, our observations suggest new opportunities for engineering topologically and symmetry-protected states via band inversions of surface states. © 2019, The Author(s).

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Language(s): eng - English
 Dates: 2019-12-022019-12-02
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1038/s41467-019-13464-z
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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 10 (1) Sequence Number: 5485 Start / End Page: 1 - 8 Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723