Equilibrium axial current due to a static localized spin in Weyl semimetals

27th International Conference on Low Temperature Physics

Taguchi, Katsuhisa^1

Department of Applied Physics, Nagoya University, Nagoya

464-8603, Japan^1

关键词: Axial currents;    Charge current;    Inversion symmetry;    Left handed;    Localized spin;    Magnetic insulator;    Right handed;    Time reversal;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/568/5/052032/pdf
DOI  :  10.1088/1742-6596/568/5/052032

来源: IOP

【 摘 要 】

We theoretically study the equilibrium axial current jeq5, which is the difference between the charge current of left-handed and right-handed helicity of the Weyl fermions, in the junction of a magnetic insulator attached to Weyl semimetals with time-reversal breaking and inversion symmetry. The charge current of each helicity jeqγ=± is induced by the localized spin S of the magnetic insulator. jeqγ=± is proportional to ∇ × S and is independent of the sign of γ. As a result, the difference between jeqγ=+ and jeqγ=- are canceled out, and jeq5 is zero.