Magnetic torque anomaly in the quantum limit of Weyl semimetals [electronic resource].
- Washington, D.C. : United States. Dept. of Energy. Office of Basic Energy Sciences, 2016. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- Article numbers 12,492 : digital, PDF file
- Additional Creators:
- Los Alamos National Laboratory, United States. Department of Energy. Office of Basic Energy Sciences, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Electrons in materials with linear dispersion behave as massless Weyl- or Dirac-quasiparticles, 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.
- Published through SciTech Connect., 08/22/2016., "la-ur--17-22971", Nature Communications 7 ISSN 2041-1723 AM, and Philip J. W. Moll; Andrew C. Potter; Nityan L. Nair; B. J. Ramshaw; K. A. Modic; Scott Riggs; Bin Zeng; Nirmal J. Ghimire; Eric D. Bauer; Robert Kealhofer; Filip Ronning; James G. Analytis.
- Funding Information:
- AC52-06NA25396 and SC0002613
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