  We study black and white hole analogues in Weyl semimetals with inhomogenous
nodal tilts. We study how the presence of a microscopic lattice, giving rise to
low-energy fermion doubler states at large momenta that are not present for
elementary particles, affects the analogy between Weyl Hamiltonians and general
relativity. Using a microscopic tight-binding lattice model, we find the
doubler states to give rise to Hawking fragmentation and Hawking attenuation of
wavepackets by the analogue event horizon. These phenomena depend on an
analogue Hawking temperature, and can be measured in metamaterials and solids,
as we confirm by numerical simulations.
