AI 中文总结
研究铝体相和界面处电流感应扭矩，通过实验发现其对相邻层未产生可检测扭矩，表明铝中轨道 - 自旋转换极小，相关效应产生扭矩的普遍性和有效性较差。
AI 中文摘要
轻金属铝被预测分别从其体相和界面具有强烈的轨道霍尔和 Rashba 效应。在本信函中，我们报告了实验证据，即铝的体相和界面均未对具有显著自旋霍尔效应、自旋 - 轨道耦合以及与铝的电阻率失配的相邻钴和铁铂层产生可检测到的扭矩。这些结果表明铝中轨道 - 自旋转换极小，并且在钴/铝、铝/钴和铝/铁铂双层中轨道输运和自旋涡旋扭矩可忽略不计。我们的发现表明轨道霍尔效应、界面轨道 Rashba 效应和自旋涡旋耦合产生扭矩的普遍性和/或有效性较差。
英文摘要
The light metal Al was predicted to have strong orbital Hall and Rashba effects from its bulk and interface, respectively. In this letter, we report experimental evidence that neither the bulk nor the interface of the Al contributed a detectable torque on adjacent Co and FePt layers with significant spin Hall effect, spin-orbit coupling, and resistivity mismatch with Al. These results suggest minimal orbital-spin conversion in Al and negligible orbital transport and spin-vorticity torque in Co/Al, Al/Co, and Al/FePt bilayers. Our findings suggest poor generality and/or effectiveness of torque contributions by the orbital Hall effect, the interfacial orbital Rashba effect, and the spin-vorticity coupling.
Journal refPhys. Rev. B 114, L020405 (2026)
