Dirty Weyl fermions: rare region effects near 3D Dirac points
Dirty Weyl fermions: rare region effects near 3D Dirac points
We study three-dimensional Dirac fermions with weak finite-range scalar potential disorder. We show that even though disorder is perturbatively irrelevant at 3D Dirac points, nonperturbative effects from rare regions give rise to a nonzero density of states and a finite mean free path, with the transport at the Dirac point …