Non-local Signatures of the Chiral Magnetic Effect in Dirac Semimetal Bi<sub>0.97</sub>Sb<sub>0.03</sub>

ORAL

Abstract

Recently there has been a lot of interest in 3D Dirac semimetals (DSM), which exhibit robust Dirac phases in the bulk of the material. The chiral magnetic effect (CME), which originates from the Weyl cones, causes an E.B-dependent chiral charge polarization, which manifests itself as negative magnetoresistance.

We exploit the extended lifetime of this chirally polarized charge and study the CME in both local and non-local measurements on structured devices of mechanically exfoliated single crystalline flakes of DSM Bi1-xSbx with x ≈ 0.03. From the transport measurements on the non-local devices we find that the chiral charge relaxation time is over an order of magnitude larger than the transport lifetime.

*The authors acknowledge financial support from the European Research Council through a Consolidator Grant and from the Netherlands Organization for Scientific Research through a VICI Grant.

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Presenters

  • Daan Wielens

    • University of Twente

Authors

  • Daan Wielens

    • University of Twente

  • Jorrit C. De Boer

    • University of Twente

  • Joris A. Voerman

    • University of Twente

  • Bob de Ronde

    • University of Twente

  • Yingkai Huang

    • University of Amsterdam
    • Zeeman Institute, University of Amsterdam

  • Mark Golden

    • University of Amsterdam
    • Zeeman Institute, University of Amsterdam

  • Chuan Li

    • MESA+ Institute for Nanotechnology, University of Twente
    • University of Twente

  • Alexander Brinkman

    • University of Twente