  We study the AC electrical conductivity at zero temperature in a holographic
model for a Weyl semimetal. At small frequencies we observe a linear dependence
in the frequency. The model shows a quantum phase transition between a
topological semimetal (Weyl semimetal phase) with a non vanishing anomalous
Hall conductivity and a trivial semimetal. The AC conductivity has an
intermediate scaling due to the presence of a quantum critical region in the
phase diagram of the system. The phase diagram is reconstructed using the
scaling properties of the conductivity. We compare with the experimental data
of [1502.03807] obtaining qualitative agreement.
