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Quantum limit transport and destruction of the Weyl nodes in TaAs

Author

Listed:
  • B. J. Ramshaw

    (Cornell University
    Los Alamos National Laboratory)

  • K. A. Modic

    (Max-Planck-Institute for Chemical Physics of Solids)

  • Arkady Shekhter

    (National High Magnetic Field Laboratory)

  • Yi Zhang

    (Cornell University)

  • Eun-Ah Kim

    (Cornell University)

  • Philip J. W. Moll

    (Max-Planck-Institute for Chemical Physics of Solids)

  • Maja D. Bachmann

    (Max-Planck-Institute for Chemical Physics of Solids)

  • M. K. Chan

    (Los Alamos National Laboratory)

  • J. B. Betts

    (Los Alamos National Laboratory)

  • F. Balakirev

    (Los Alamos National Laboratory)

  • A. Migliori

    (Los Alamos National Laboratory)

  • N. J. Ghimire

    (Los Alamos National Laboratory
    Argonne National Laboratory)

  • E. D. Bauer

    (Los Alamos National Laboratory)

  • F. Ronning

    (Los Alamos National Laboratory)

  • R. D. McDonald

    (Los Alamos National Laboratory)

Abstract

Weyl fermions are a recently discovered ingredient for correlated states of electronic matter. A key difficulty has been that real materials also contain non-Weyl quasiparticles, and disentangling the experimental signatures has proven challenging. Here we use magnetic fields up to 95 T to drive the Weyl semimetal TaAs far into its quantum limit, where only the purely chiral 0th Landau levels of the Weyl fermions are occupied. We find the electrical resistivity to be nearly independent of magnetic field up to 50 T: unusual for conventional metals but consistent with the chiral anomaly for Weyl fermions. Above 50 T we observe a two-order-of-magnitude increase in resistivity, indicating that a gap opens in the chiral Landau levels. Above 80 T we observe strong ultrasonic attenuation below 2 K, suggesting a mesoscopically textured state of matter. These results point the way to inducing new correlated states of matter in the quantum limit of Weyl semimetals.

Suggested Citation

  • B. J. Ramshaw & K. A. Modic & Arkady Shekhter & Yi Zhang & Eun-Ah Kim & Philip J. W. Moll & Maja D. Bachmann & M. K. Chan & J. B. Betts & F. Balakirev & A. Migliori & N. J. Ghimire & E. D. Bauer & F. , 2018. "Quantum limit transport and destruction of the Weyl nodes in TaAs," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04542-9
    DOI: 10.1038/s41467-018-04542-9
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    Cited by:

    1. T. Cichorek & Ł. Bochenek & J. Juraszek & Yu. V. Sharlai & G. P. Mikitik, 2022. "Detection of relativistic fermions in Weyl semimetal TaAs by magnetostriction measurements," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    2. Sami Dzsaber & Diego A. Zocco & Alix McCollam & Franziska Weickert & Ross McDonald & Mathieu Taupin & Gaku Eguchi & Xinlin Yan & Andrey Prokofiev & Lucas M. K. Tang & Bryan Vlaar & Laurel E. Winter & , 2022. "Control of electronic topology in a strongly correlated electron system," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    3. Christopher A. Mizzi & Satya K. Kushwaha & Priscila F. S. Rosa & W. Adam Phelan & David C. Arellano & Lucas A. Pressley & Tyrel M. McQueen & Mun K. Chan & Neil Harrison, 2024. "The reverse quantum limit and its implications for unconventional quantum oscillations in YbB12," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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