论文标题
磁性Weyl半法的动量空间浆果相位的旋转动力
Spin motive force by the momentum-space Berry phase in magnetic Weyl semimetals
论文作者
论文摘要
我们表明，非中心磁性WEYL半分化中铁磁矩的磁进动通过类似于绝热电荷泵送的机制诱导电流。电流是由于动力引起的Weyl节点的圆形运动而产生的动量空间中浆果相的结果。该机制类似于法拉第效应，即通过圆形电流诱导磁场。 Weyl节点的圆运动在动量空间中诱导磁电流，这导致描述绝热泵的浆果相。在实验上，这种现象类似于自旋运动力，它是在磁化空间梯度存在下诱导的电流。但是，与常规的旋转动力不同，该电流发生没有磁化梯度。结果表明拓扑电子状态和磁化动力学之间存在非平凡的相互作用。
We show that the magnetic precession of ferromagnetic moments in a noncentrosymmetric magnetic Weyl semimetal induces an electric current through a mechanism analogous to the adiabatic charge pumping. The current is a consequence of a Berry phase in the momentum space resulting from the circular motion of Weyl nodes induced by the precession. This mechanism resembles the Faraday effect, namely, induced magnetic field by circular electric current. The circular motion of Weyl nodes induces magnetic charge current in the momentum space, which results in a Berry phase that describes the adiabatic pump. Experimentally, this phenomenon is similar to spin motive force, which is an electric current induced by magnetic precision in the presence of the spatial gradient of magnetization. However, unlike the conventional spin motive force, this current occurs without a magnetization gradient. The result demonstrates a nontrivial interplay between the topological electronic state and magnetic dynamics.
