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  Magnetic torque anomaly in the quantum limit of Weyl semimetals

Moll, P. J. W., Potter, A. C., Nair, N. L., Ramshaw, B. J., Modic, K. A., Riggs, S., et al. (2016). Magnetic torque anomaly in the quantum limit of Weyl semimetals. Nature Communications, 7: 12492, pp. 1-7. doi:10.1038/ncomms12492.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-5560-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-0C59-F
Genre: Journal Article

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 Creators:
Moll, Philip J. W.1, Author              
Potter, Andrew C.2, Author
Nair, Nityan L.2, Author
Ramshaw, B. J.2, Author
Modic, K. A.1, Author              
Riggs, Scott2, Author
Zeng, Bin2, Author
Ghimire, Nirmal J.2, Author
Bauer, Eric D.2, Author
Kealhofer, Robert2, Author
Ronning, Filip2, Author
Analytis, James G.2, Author
Affiliations:
1Physics of Microstructured Quantum Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_2466701              
2External Organizations, ou_persistent22              

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 Abstract: Electrons in materials with linear dispersion behave as massless Weyl-or Dirac-quasi-particles, and continue to intrigue due to their close resemblance to elusive ultra-relativistic particles as well as their potential for future electronics. Yet the experimental signatures of Weyl-fermions are often subtle and indirect, in particular if they coexist with conventional, massive quasiparticles. Here we show a pronounced anomaly in the magnetic torque of the Weyl semimetal NbAs upon entering the quantum limit state in high magnetic fields. The torque changes sign in the quantum limit, signalling a reversal of the magnetic anisotropy that can be directly attributed to the topological nature of the Weyl electrons. Our results establish that anomalous quantum limit torque measurements provide a direct experimental method to identify and distinguish Weyl and Dirac systems.

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Language(s): eng - English
 Dates: 2016-08-222016-08-22
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000381905000001
DOI: 10.1038/ncomms12492
 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: 12492 Start / End Page: 1 - 7 Identifier: ISSN: 2041-1723
CoNE: /journals/resource/2041-1723