论文标题
解决晶体对称性降低的系统中电荷旋转互连产生的自旋电流和自旋密度
Resolving spin currents and spin densities generated by charge-spin interconversion in systems with reduced crystal symmetry
论文作者
论文摘要
在任意方向上控制旋转的能力是Spintronics的长期目标。电荷到旋转互连（CSI）现象在很大程度上取决于对称性。具有降低晶体对称性的系统允许各向异性CSI具有非常规组件，其中电荷和自旋电流以及自旋极化并非相互垂直。在这里，我们通过实验证明，石墨烯-WTE2中的CSI在所有三个空间方向上诱导了具有组件的旋转。通过以特定的磁场取向进行多末端非局部自旋进动实验，我们讨论了如何将CSI与自旋大厅和反自旋电流效应脱离。
The ability to control the generation of spins in arbitrary directions is a long-sought goal in spintronics. Charge-to-spin interconversion (CSI) phenomena depend strongly on symmetry. Systems with reduced crystal symmetry allow anisotropic CSI with unconventional components, where charge and spin currents and the spin polarization are not mutually perpendicular to each other. Here, we demonstrate experimentally that the CSI in graphene-WTe2 induces spins with components in all three spatial directions. By performing multi-terminal nonlocal spin precession experiments, with specific magnetic field orientations, we discuss how to disentangle the CSI from the spin Hall and inverse spin galvanic effects.
