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  Possible Weyl fermions in the magnetic Kondo system CeSb

Guo, C., Cao, C., Smidman, M., Wu, F., Zhang, Y., Steglich, F., et al. (2017). Possible Weyl fermions in the magnetic Kondo system CeSb. npj Quantum Materials, 2: 39, pp. 1-6. doi:10.1038/s41535-017-0038-3.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-D7DB-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-D7DD-4
Genre: Journal Article

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 Creators:
Guo, Chunyu1, Author
Cao, Chao1, Author
Smidman, Michael1, Author
Wu, Fan1, Author
Zhang, Yongjun1, Author
Steglich, Frank2, Author              
Zhang, Fu-Chun1, Author
Yuan, Huiqiu1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Frank Steglich, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863467              

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 Abstract: Materials where the electronic bands have unusual topologies allow for the realisation of novel physics and have a wide range of potential applications. When two electronic bands with linear dispersions intersect at a point, the excitations could be described as Weyl fermions, which are massless particles with a particular chirality. Here we report evidence for the presence of Weyl fermions in the ferromagnetic state of the low-carrier density, strongly correlated Kondo lattice system CeSb, from electronic structure calculations and angle-dependent magnetoresistance measurements. When the applied magnetic field is parallel to the electric current, a pronounced negative magnetoresistance is observed within the ferromagnetic state, which is destroyed upon slightly rotating the field away. These results give evidence for CeSb belonging to a new class of Kondo lattice materials with Weyl fermions in the ferromagnetic state.

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Language(s): eng - English
 Dates: 2017-07-132017-07-13
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000407433800001
DOI: 10.1038/s41535-017-0038-3
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Title: npj Quantum Materials
Source Genre: Journal
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Publ. Info: [London] : Nature Publishing Group
Pages: - Volume / Issue: 2 Sequence Number: 39 Start / End Page: 1 - 6 Identifier: Other: 2397-4648
CoNE: /journals/resource/2397-4648