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arXiv 2503.16319cond-mat.mtrl-scicond-mat.other
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轨道Rashba纹理中的扭矩结构:Co/Al界面案例

Anatomy of torques from orbital Rashba textures: the case of Co/Al interfaces

Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay(阿尔伯特·费尔特实验室,法国国家科学研究中心,泰雷兹集团,巴黎萨克雷大学);Aix-Marseille Université, CNRS, CINaM(艾克斯-马赛大学,法国国家科学研究中心,中性物质化学研究所)

A. Pezo, N. Sebe, A. Manchon, V. Cros, H. Jaffrès

AI总结:

研究通过轨道Rashba-Edelstein效应揭示Co/Al界面强轨道扭矩的产生机制,并探讨Pt层对扭矩抑制的影响。

摘要:

在轨道电子学的背景下,通过轨道Rashba-Edelstein效应从光金属界面的轨道纹理中产生轨道角动量的上升,如今代表了比传统重金属自旋基材料非凡的替代方案。在非常近期的实验结果 [S. Krishnia 等,Nanoletters 2023, 23, 6785] 的背景下,从最先进的密度泛函理论模拟出发,我们提供了关于在Co/Al界面位置出现非常强的轨道扭矩的理论见解。通过线性响应理论,我们计算了作用在超薄Co上的所施加的轨道扭矩幅度,主要是场型的本带特征。此外,我们还显示,插入一个Pt原子层在Co和Al之间足以抑制该效应,这引发了关于扭矩作用的解剖明显不同于标准方式的疑问。这项工作为自旋电子器件的工程开辟了新途径。

英文摘要:

In the context of orbitronics, the rising of the orbital angular momentum generated at light metal interfaces from orbital textures via orbital Rashba-Edelstein effects nowadays represent extraordinary alternatives to the usual heavy-metal spin-based materials. In the light of very recent experimental results [\textcolor{blue}{S. Krishnia \textit{et al.}, Nanoletters 2023, 23, 6785}], starting from state-of-the-art density functional theory simulations, we provide theoretical insights into the emergence of very strong orbital torques at the Co/Al interface location a strong orbital Rashba texture. By using linear response theory, we calculate the exerted orbital torque amplitudes, mainly of field-like intraband character, acting onto the ultrathin Co. Moreover, we show that an insertion of a single atomic plane of Pt between Co and Al is enough to suppress the effect which questions about the anatomy of the torque action clearly behaving differently than in the standard way. This work opens new routes to the engineering of spintronic devices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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