Insulating transport in anisotropic metals: breakdown of Drude transport and the puzzling $c$-axis resistivity of Sr${}_2$RuO${}_4$ and other layered oxides

Sophie Beck, Matthew Shammami, Lorenzo Van Muñoz +3

We reveal a mechanism that may explain the non-metallic out-of-plane resistivity in layered metals. By carefully examining how the Drude-Boltzmann expression for the $c$-axis condu…