Wide-range T 2 resistivity and umklapp scattering in moiré graphene

  title={Wide-range T 2 resistivity and umklapp scattering in moir{\'e} graphene},
  author={Hiroaki Ishizuka and Leonid S. Levitov},
  journal={New Journal of Physics},
We argue that the unusually strong electron–electron interactions in the narrow bands in moiré superlattices originate from compact Wannier orbitals. Enhanced overlaps of electronic wavefunctions, enabled by such orbitals, result in a strong el–el superlattice umklapp scattering. We identify the umklapp scattering processes as a source of the strong temperature-dependent resistivity observed in these systems. In a simple model, the umklapp scattering predicts a T-dependent resistivity that… 


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