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  Signatures of Sixfold Degenerate Exotic Fermions in a Superconducting Metal PdSb2

Kumar, N., Yao, M., Nayak, J., Vergniory, M. G., Bannies, J., Wang, Z., et al. (2020). Signatures of Sixfold Degenerate Exotic Fermions in a Superconducting Metal PdSb2. Advanced Materials, 1906046, pp. 1-6. doi:10.1002/adma.201906046.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-B9D7-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-C2DB-8
Genre: Journal Article

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Kumar_Signatures.pdf (Publisher version), 2MB
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2020
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 Creators:
Kumar, Nitesh1, Author              
Yao, Mengyu1, Author              
Nayak, Jayita1, Author              
Vergniory, Maia G.2, Author
Bannies, Jörn1, Author              
Wang, Zhijun2, Author
Schröter, Niels B. M.2, Author
Strocov, Vladimir N.2, Author
Müchler, Lukas1, Author              
Shi, Wujun1, Author              
Rienks, Emile D. L.2, Author
Manes, J. L.2, Author
Shekhar, Chandra3, Author              
Parkin, Stuart S. P.2, Author
Fink, Jörg1, Author              
Fecher, Gerhard H.4, Author              
Sun, Yan1, Author              
Bernevig, B. Andrei2, Author
Felser, Claudia5, Author              
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2External Organizations, ou_persistent22              
3Chandra Shekhar, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863428              
4Gerhard Fecher, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863431              
5Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: Multifold degenerate points in the electronic structure of metals lead to exotic behaviors. These range from twofold and fourfold degenerate Weyl and Dirac points, respectively, to sixfold and eightfold degenerate points that are predicted to give rise, under modest magnetic fields or strain, to topological semimetallic behaviors. The present study shows that the nonsymmorphic compound PdSb2 hosts six-component fermions or sextuplets. Using angle-resolved photoemission spectroscopy, crossing points formed by three twofold degenerate parabolic bands are directly observed at the corner of the Brillouin zone. The group theory analysis proves that under weak spin-orbit interaction, a band inversion occurs.

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Language(s): eng - English
 Dates: 2020-02-092020-02-09
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000512110900001
DOI: 10.1002/adma.201906046
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Title: Advanced Materials
  Other : Adv. Mater.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: - Sequence Number: 1906046 Start / End Page: 1 - 6 Identifier: ISSN: 0935-9648
CoNE: https://pure.mpg.de/cone/journals/resource/954925570855