Abstract
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 [1] obtaining qualitative agreement.
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Grignani, G., Marini, A., Peña-Benitez, F. et al. AC conductivity for a holographic Weyl semimetal. J. High Energ. Phys. 2017, 125 (2017). https://doi.org/10.1007/JHEP03(2017)125
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DOI: https://doi.org/10.1007/JHEP03(2017)125