Unusual interlayer quantum transport behavior caused by the zeroth Landau level in YbMnBi2

J. Y. Liu, J. Hu, D. Graf, T. Zou, M. Zhu, Y. Shi, S. Che, S. M.A. Radmanesh, C. N. Lau, L. Spinu, H. B. Cao, X. Ke, Z. Q. Mao

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Abstract

Relativistic fermions in topological quantum materials are characterized by linear energy-momentum dispersion near band crossing points. Under magnetic fields, relativistic fermions acquire Berry phase of π in cyclotron motion, leading to a zeroth Landau level (LL) at the crossing point, a signature unique to relativistic fermions. Here we report the unusual interlayer quantum transport behavior resulting from the zeroth LL mode observed in the time reversal symmetry breaking type II Weyl semimetal YbMnBi2. The interlayer magnetoresistivity and Hall conductivity of this material are found to exhibit surprising angular dependences under high fields, which can be well fitted by a model, which considers the interlayer quantum tunneling transport of the zeroth LL's Weyl fermions. Our results shed light on the unusual role of zeroth LLl mode in transport.

Original languageEnglish (US)
Article number646
JournalNature communications
Volume8
Issue number1
DOIs
StatePublished - Dec 1 2017

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Liu, J. Y., Hu, J., Graf, D., Zou, T., Zhu, M., Shi, Y., Che, S., Radmanesh, S. M. A., Lau, C. N., Spinu, L., Cao, H. B., Ke, X., & Mao, Z. Q. (2017). Unusual interlayer quantum transport behavior caused by the zeroth Landau level in YbMnBi2. Nature communications, 8(1), [646]. https://doi.org/10.1038/s41467-017-00673-7