Equilibrium axial current due to a static localized spin in Weyl semimetals
Equilibrium axial current due to a static localized spin in Weyl semimetals
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外尔半金属中静态局部自旋产生的平衡轴向电流
DOI：
10.1088/1742-6596/568/5/052032
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Katsuhisa Taguchi
中科院分区：
文献类型：
--
作者：
針間正幸;堀井陽介;森本貴明;大木義路;芹口真結子;古本 真;Katsuhisa Taguchi
我们从理论上研究了平衡轴向电流jeq 5，这是左手和右手螺旋的Weyl费米子的电荷电流之间的差异，在连接到Weyl半金属的时间反转破缺和反转对称的磁性绝缘体的结。每个螺旋度j eq γ=±的电荷电流由磁性绝缘体的局域自旋S引起。j eq γ=±与S × S成正比，与γ的符号无关。结果，j eq γ=+和j eq γ=−之间的差被抵消，并且j eq 5为零。
We theoretically study the equilibrium axial current j eq 5, 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 j eq γ=±is induced by the localized spin S of the magnetic insulator. j eq γ=±is proportional to∇× S and is independent of the sign of γ. As a result, the difference between j eq γ=+ and j eq γ=− are canceled out, and j eq 5 is zero.