In this paper, we investigate the AC charge transport in the holographic Horndeski gravity and identify a metal-semiconductor like transition that is driven by the Horndeski coupling. Moreover, we fit our numeric data by the Drude formula in slow relaxation cases.
@article{arxiv.1909.00224,
title = {AC charge transport in holographic Horndeski gravity},
author = {Xi-Jing Wang and Hai-Shan Liu and Wei-Jia Li},
journal= {arXiv preprint arXiv:1909.00224},
year = {2019}
}