Magnetotransport in spin-orbit coupled non-centrosymmetric and Weyl metals.

Recently, chiral anomaly (CA) has been proposed to occur in spin-orbit coupled (SOC) non-centrosymmetric metals, motivating CA to be a Fermi surface property rather than a Weyl node property. Although the nature of the anomaly is similar in both SOC and Weyl systems, here we point out significant fundamental differences between the two. We show that the different nature of the orbital magnetic moment (OMM) in the two systems leads to nontrivial consequences, particularly the sign of the longitudinal magnetoconductance always remains positive in SOC metal, unlike a Weyl metal that can display either sign. Furthermore, we also investigate planar Hall effect and the anomalous Nernst effect in the two systems and point out important differences in the two systems.