Surface Rashba-Edelstein Spin-Orbit Torque Revealed by Molecular Self-Assembly
Surface Rashba-Edelstein Spin-Orbit Torque Revealed by Molecular Self-Assembly
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分子自组装揭示的表面 Rashba-Edelstein 自旋轨道扭矩
DOI：
10.1103/physrevapplied.13.044069
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发表时间：
2020
影响因子：
4.6
通讯作者：
Kazuya Ando
中科院分区：
文献类型：
--
作者：
Satoshi Haku;Atsushi Ishikawa;Akira Musha;Hiroyasu Nakayama;Takashi Yamamoto;Kazuya Ando
我们报告的观察自旋轨道力矩（SOT）起源于表面Rashba-Edelstein效应。我们发现，在一个典型的自旋-轨道电子系统，a/双层，SOT可以操纵的分子自组装thesurface。这提供了证据表明，Rashba自旋轨道耦合在thesurface产生了一个相当大的SOT，这是隐藏在强大的体和界面自旋轨道耦合。我们表明，表面Rashba-Edelstein SOT的分子调谐与密度泛函理论计算是一致的。这些结果说明了表面自旋-轨道耦合在SOT产生中的关键作用，它改变了金属自旋-轨道电子器件的前景。
We report the observation of a spin-orbit torque (SOT) originating from the surface Rashba-Edelstein effect. We find that the SOT in a prototypical spin-orbitronic system, a/bilayer, can be manipulated by molecular self-assembly on thesurface. This provides evidence that the Rashba spin-orbit coupling at thesurface generates a sizable SOT, which is hidden by the strong bulk and interface spin-orbit coupling. We show that the molecular tuning of the surface Rashba-Edelstein SOT is consistent with density-functional-theory calculations. These results illustrate the crucial role of the surface spin-orbit coupling in the SOT generation, which alters the landscape of metallic spin-orbitronic devices.