Nonlocal Coulomb drag in Weyl semimetals

  title={Nonlocal Coulomb drag in Weyl semimetals},
  author={Yuval Baum and Ady Stern},
  journal={Physical Review B},
Nonlocality is one of the most striking signatures of the topological nature of Weyl semimetals. We propose to probe the nonlocality in these materials via a measurement of a magnetic-field-dependent Coulomb drag between two sheets of graphene which are separated by a three-dimensional slab of Weyl semimetal. We predict a mechanism of Coulomb drag, based on cyclotron orbits that are split between opposite surfaces of the semimetal. In the absence of impurity scattering between different Weyl… 
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