论文标题

大区域插入的2D-PB/石墨烯异质结构作为生成自旋轨道扭矩的平台

Large-Area Intercalated 2D-Pb/Graphene Heterostructure as a Platform for Generating Spin-Orbit Torque

论文作者

Vera, Alexander, Zheng, Boyang, Yanez, Wilson, Yang, Kaijie, Kim, Seong Yeoul, Wang, Xinglu, Kotsakidis, Jimmy C., El-Sherif, Hesham, Krishnan, Gopi, Koch, Roland J., Bowen, T. Andrew, Dong, Chengye, Wang, Yuanxi, Wetherington, Maxwell, Rotenberg, Eli, Bassim, Nabil, Friedman, Adam L., Wallace, Robert M., Liu, Chaoxing, Samarth, Nitin, Crespi, Vincent H., Robinson, Joshua A.

论文摘要

合成超薄重金属的可扩展平台可以使下一代Spintronics的高效率到旋转转换。在这里,我们报告了由Boindinement Heteroepitaxy(Chet)在SIC(0001)上的双层石墨烯下方的空气稳定,外上登记的单层PB的合成。衍射,光谱和显微镜揭示了基于CHET的PB插入,主要表现出由于有序的Frenkel-Kontorova类似域壁的有序网络,因此表现出斑驳的六边形上层建筑。该系统的空气稳定性可以实现前静态自旋扭矩铁磁共振(ST-FMR)测量值,该测量表明与对照样品相比,有效野外比的电荷/PB/PB/Ferromagnet异质结构中的电荷与旋转转化率增加了1.5倍。

A scalable platform to synthesize ultrathin heavy metals may enable high efficiency charge-to-spin conversion for next-generation spintronics. Here we report the synthesis of air-stable, epitaxially registered monolayer Pb underneath bilayer graphene on SiC (0001) by confinement heteroepitaxy (CHet). Diffraction, spectroscopy, and microscopy reveal CHet-based Pb intercalation predominantly exhibits a mottled hexagonal superstructure due to an ordered network of Frenkel-Kontorova-like domain walls. The system's air stability enables ex-situ spin torque ferromagnetic resonance (ST-FMR) measurements that demonstrate charge-to-spin conversion in graphene/Pb/ferromagnet heterostructures with a 1.5x increase in the effective field ratio compared to control samples.

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