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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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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: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 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