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Condensed Matter > Materials Science
Title: Large-Area Intercalated 2D-Pb/Graphene Heterostructure as a Platform for Generating Spin-Orbit Torque
(Submitted on 13 May 2022 (v1), last revised 27 Mar 2024 (this version, v3))
Abstract: A scalable platform to synthesize ultrathin heavy metals may enable high efficiency charge-to-spin conversion for next-generation spintronics. Here we report centimeter-scale 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.
Submission history
From: Alexander Vera [view email][v1] Fri, 13 May 2022 19:11:18 GMT (4135kb)
[v2] Fri, 15 Jul 2022 13:46:31 GMT (6657kb)
[v3] Wed, 27 Mar 2024 19:35:42 GMT (3508kb)
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