Non-local Signatures of the Chiral Magnetic Effect in Dirac Semimetal Bi0.97Sb0.03
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.
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.
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Presenters
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Daan Wielens
University of Twente
Authors
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Daan Wielens
University of Twente
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Jorrit C. De Boer
University of Twente
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Joris A. Voerman
University of Twente
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Bob de Ronde
University of Twente
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Yingkai Huang
University of Amsterdam, Zeeman Institute, University of Amsterdam
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Mark Golden
University of Amsterdam, Zeeman Institute, University of Amsterdam
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Chuan Li
MESA+ Institute for Nanotechnology, University of Twente, University of Twente
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Alexander Brinkman
University of Twente