论文标题
铁磁金属/CU/AL2O3的非平凡电荷转换为轨道运输
Non-trivial charge-to-spin conversion in ferromagnetic metal/Cu/Al2O3 by orbital transport
论文作者
论文摘要
需要有效的自旋/电荷互转换来开发创新的基于自旋的设备。到目前为止，已经通过使用重原子元素，强烈的自旋轨道相互作用来实现通过自旋霍尔效应和Edelstein效应实现互转换的互连。我们在铁磁金属/CU/AL2O3三层中展示了高效的电荷到旋转转换，该转换不包含任何重元素。所得的自旋扭矩效率高于传统自旋大厅和RashBA系统的旋转扭矩效率，该系统由PT和BI等重元素组成。我们的实验结果定性地偏离了自旋传输引起的典型行为。但是，它们与轨道运输产生的行为令人惊讶地一致。因此，我们的结果证明了通过轨道传输有效的电荷转换转换的新方向。
Efficient spin/charge interconversion is desired to develop innovative spin-based devices. So far, the interconversion has been performed by using heavy atomic elements, strong spin-orbit interaction of which realizes the interconversion through the spin Hall effect and the Edelstein effect. We demonstrate highly efficient charge-to-spin conversion in a ferromagnetic metal/Cu/Al2O3 trilayers, which do not contain any heavy element. The resulting spin torque efficiency is higher than those of conventional spin Hall and Rashba systems consisting of heavy elements such as Pt and Bi. Our experimental results qualitatively deviate from typical behaviors arising from spin transport. However, they are surprisingly consistent with the behaviors arising from the orbital transport. Our results thus demonstrate a new direction for efficient charge-to-spin conversion through the orbital transport.
