马格农中介电荷-旋转-轨道电流相互转换中的非互惠性
José Omar Ledesma-Martin1,2, Edgar Galindez-Ruales1, Sachin Krishnia1
1Institute of Physics, Johannes Gutenberg University Mainz, 55099 Mainz, Germany.
Nano letters
|February 14, 2025
概括
将轨道霍尔效应 (OHE) 引入具有伊铁石榴石 (YIG) 的非局部自旋电子设备中,会破坏角动量传输互惠性. 这项研究显示,由于OHE介导的旋转旋,效率增加了35%,突出了旋转电子学中的轨道效应.
科学领域:
- 这就是Spintronics.
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
背景情况:
- 磁系统中的角运动量传输涉及自旋和轨道自由度.
- 非局部设备使用重金属纳米线在磁绝缘体上 (例如,YIG) 进行磁介导角动量传输.
- 旋转霍尔效应 (SHE) 和反向SHE (iSHE) 是旋转积累和检测的关键机制.
研究的目的:
- 研究轨道霍尔效应 (OHE) 对非局部自旋电子装置中角动量传输的互惠性的影响.
- 量化OHE与SHE一起引入的效率变化.
- 探索潜在的物理机制,如自旋旋,负责观察到的非互惠.
主要方法:
- 使用重金属 (Pt/Ru) 层在伊铁石 (YIG) 基板上制造非局部的自旋电子设备.
- 利用自旋霍尔效应 (SHE) 和轨道霍尔效应 (OHE) 进行磁极化和通过反向SHE (iSHE) 进行检测.
- 在注入器和检测器角色的前向和反向配置中比较角度运动量传输的效率.
主要成果:
- 卢 (Ru) 的引入,使OHE成为可能,打破了旋转运输的典型互惠.
- 与相反的过程相比,在SHE和OHE组合的极化时,观察到马格农运输的效率提高了35%.
- 观察到的非互惠性归因于来自Pt/Ru界面的不同电子漂移速度的非零自旋旋.
结论:
- 轨道运输机制,特别是OHE,在非局部自旋电子设备中显著影响角度运动量运输效率.
- 这些发现表明,通过利用轨道效应来设计非互惠旋转运输的潜在途径.
- 这项研究为控制和增强下一代旋转技术中的旋转动态开辟了新的途径.
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