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  Negative magnetoresistance without well-defined chirality in the Weyl semimetal TaP

Arnold, F., Shekhar, C., Wu, S.-C., Sun, Y., Donizeth dos Reis, R., Kumar, N., et al. (2016). Negative magnetoresistance without well-defined chirality in the Weyl semimetal TaP. Nature Communications, 7: 11615, pp. 1-7. doi:10.1038/ncomms11615.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-8100-D Version Permalink: http://hdl.handle.net/21.11116/0000-0001-0917-C
Genre: Journal Article

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 Creators:
Arnold, Frank1, Author              
Shekhar, Chandra2, Author              
Wu, Shu-Chun3, Author              
Sun, Yan3, Author              
Donizeth dos Reis, Ricardo4, Author              
Kumar, Nitesh3, Author              
Naumann, Marcel1, Author              
Ajeesh, Mukkattu O.4, Author              
Schmidt, Marcus5, Author              
Grushin, Adolfo G.6, Author
Bardarson, Jens H.6, Author
Baenitz, Michael7, Author              
Sokolov, Dmitry4, Author              
Borrmann, Horst8, Author              
Nicklas, Michael9, Author              
Felser, Claudia10, Author              
Hassinger, Elena1, Author              
Yan, Binghai11, Author              
Affiliations:
1Physics of Unconventional Metals and Superconductors, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_2466700              
2Chandra Shekhar, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863428              
3Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
4Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
5Marcus Schmidt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863415              
6External Organizations, ou_persistent22              
7Michael Baenitz, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863471              
8Horst Borrmann, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863410              
9Michael Nicklas, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863472              
10Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              
11Binghai Yan, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863427              

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 Abstract: Weyl semimetals (WSMs) are topological quantum states wherein the electronic bands disperse linearly around pairs of nodes with fixed chirality, the Weyl points. In WSMs, nonorthogonal electric and magnetic fields induce an exotic phenomenon known as the chiral anomaly, resulting in an unconventional negative longitudinal magnetoresistance, the chiral-magnetic effect. However, it remains an open question to which extent this effect survives when chirality is not well-defined. Here, we establish the detailed Fermi-surface topology of the recently identified WSM TaP via combined angle-resolved quantum-oscillation spectra and band-structure calculations. The Fermi surface forms banana-shaped electron and hole pockets surrounding pairs of Weyl points. Although this means that chirality is ill-defined in TaP, we observe a large negative longitudinal magnetoresistance. We show that the magnetoresistance can be affected by a magnetic field-induced inhomogeneous current distribution inside the sample.

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Language(s): eng - English
 Dates: 2016-05-172016-05-17
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1038/ncomms11615
 Degree: -

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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: 7 Sequence Number: 11615 Start / End Page: 1 - 7 Identifier: ISSN: 2041-1723
CoNE: /journals/resource/2041-1723