Large-Area Intercalated Two-Dimensional Pb/Graphene Heterostructure as a Platform for Generating Spin-Orbit Torque.
Alexander VeraBoyang ZhengWilson YanezKaijie YangSeong Yeoul KimXinglu WangJimmy C KotsakidisHesham M El-SherifGopi KrishnanRoland J KochT Andrew BowenChengye DongYuanxi WangMaxwell WetheringtonEli RotenbergNabil D BassimAdam L FriedmanRobert M WallaceChaoxing LiuNitin SamarthVincent H CrespiJoshua A RobinsonPublished in: ACS nano (2024)
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 graphene on SiC (0001) by confinement heteroepitaxy (CHet). Diffraction, spectroscopy, and microscopy reveal that 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 1.5× increase in the effective field ratio compared to control samples.
Keyphrases
- room temperature
- heavy metals
- high efficiency
- single molecule
- risk assessment
- health risk assessment
- ionic liquid
- health risk
- high throughput
- high resolution
- aqueous solution
- sewage sludge
- density functional theory
- single cell
- genome wide
- high speed
- energy transfer
- solar cells
- african american
- quantum dots
- network analysis