Anomalous Hall effect in type-I Weyl metals beyond the noncrossing approximation

Abstract

We study the anomalous Hall effect (AHE) in tilted Weyl metals with Gaussian disorder due to the crossed X and {\Psi} diagrams in this work. The importance of such diagrams to the AHE has been demonstrated recently in two dimensional (2D) massive Dirac model and Rashba ferromagnets. It has been shown that the inclusion of such diagrams dramatically changes the total AHE in such systems. In this work, we show that the contributions from the X and {\Psi} diagrams to the AHE in tilted Weyl metals are of the same order of the non-crossing diagram we studied in a previous work, but with opposite sign. The total contribution of the X and {\Psi} diagrams cancels the majority part of the contribution from the non-crossing diagram in tilted Weyl metals, similar to the 2D massive Dirac model. We also discuss the difference of the contributions from the crossed diagrams between 2D massive Dirac model and the tilted Weyl metals. At last, we discuss the experimental relevance of observing the AHE due to the X and {\Psi} diagrams in type-I Weyl metal such as Co3Sn2S2.