Field-induced metal-insulator Field-induced metal-insulator transition in the c-axis resistivity of graphite

We show that the resistivity perpendicular ${\rho }_c$ and parallel ${\rho }_a$ to the basal planes of different graphite samples show similar magnetic-field-driven metal-insulator-transitions at a field $B_c\sim 0.1T$ applied parallel to the c-axis. Our results demonstrate the universality of the recently found scaling in ${\rho }_a$ of graphite and indicate that the metallic-like temperature dependence of ${\rho }_c$ is directly correlated to that of ${\rho }_a$. The similar magnetoresistance found for both resistivities, the violation of Kohler’s rule and the field-induced transition indicate that the semiclassical transport theory is inadecuate to understand the transport properties of graphite.