Abstract
We theoretically study chiral magnetic effect in type-II Weyl semimetals based on a concise formalism for the magnetoconductance in the semiclassical limit. Using the formula, we find that the anomaly-related current is generally dominated by the contribution from the Weyl nodes when the Fermi level is sufficiently close to the nodes. This is related to the fact that the current is proportional to the square of the Berry curvature, which enhances the contribution from the electrons around the Weyl nodes. The increase and the anisotropy of magnetoconductance induced by the tilting is also explained in a comprehensive way.
Highlights
Weyl semimetals[1,2,3,4,5] has been studied intensively for its interesting properties and fundamental questions related to Weyl fermions[6]
While the Weyl semimetals are considered as a realization of the Weyl fermions, the Weyl electrons in solids is somewhat different from the ideal Weyl Hamiltonian
We investigated the general properties of the anomaly-related magnetoconductance using the Wpn vector formalism in Eq (1)
Summary
Weyl semimetals[1,2,3,4,5] has been studied intensively for its interesting properties and fundamental questions related to Weyl fermions[6]. This essentially assumes the energy www.nature.com/scientificreports monotonically increases along pz, and the two bands has one Fermi surface which extends to p → ∞. The dominant contribution from the Weyl nodes are related to the fact that the chiral magnetic effect is a response in the second-order of the Berry curvature.
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