Intrinsic relative magnetoconductivity of nonmagnetic metals

We present a theory of magnetoconductivity for general three-dimensional nonmagnetic metals within the Berry-curvature-corrected semiclassical and Boltzmann framework. We find a contribution, which is intrinsic in the sense that its ratio to the zero-magnetic-field conductivity is fully determined by the intrinsic band properties, independent of the transport relaxation time, showing a clear violation of Kohler's rule. Remarkably, this contribution can generally be positive for the longitudinal configuration, providing a mechanism for the appearance of positive longitudinal magnetoconductivity besides the chiral anomaly effect.