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We investigate transport in type-I/type-II Weyl semi\-metal heterostructuresthat realize effective black- or white-hole event horizons. We provide an exactsolution to the scattering problem at normal incidence and low energies, bothfor a sharp and a slowly-varying Weyl cone tilt profile. In the latter case, wefind two channels with transmission amplitudes analog to those of Hawkingradiation. Whereas the Hawking-like signatures of these two channels cancel inequilibrium, we demonstrate that one can favor the contribution of eitherchannel using a non-equilibrium state, either by irradiating the type-II regionor by coupling it to a magnetic lead. This in turn gives rise to a peak in thetwo-terminal differential conductance which can serve as an experimentalindicator of the artificial event horizon.

Artificial event horizons in Weyl semimetal heterostructures and their non-equilibrium signatures