Abstract
We theoretically study current- and charge-induced spin torques in magnetic Weyl semimetals (WSMs). In magnetic WSMs, a topologically nontrivial band structure mediates the anomalous coupling between magnetization and transport, making WSMs preferable for spintronics systems. In this study, we determine all current-induced spin torques including spin–orbit torque and spin-transfer torque, up to the first order with respect to spatial and temporal derivatives and electrical currents. We also calculate the charge-induced spin torque microscopically. We find that the charge-induced spin torque originates from the chiral anomaly due to the correspondence between spin operators and axial current operators in our model.
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