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arXiv:2205.06859 (cond-mat)
[Submitted on 13 May 2022 (v1), last revised 20 Aug 2024 (this version, v4)]

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

Authors:Alexander Vera, Boyang Zheng, Wilson Yanez, Kaijie Yang, Seong Yeoul Kim, Xinglu Wang, Jimmy C. Kotsakidis, Hesham El-Sherif, Gopi Krishnan, Roland J. Koch, T. Andrew Bowen, Chengye Dong, Yuanxi Wang, Maxwell Wetherington, Eli Rotenberg, Nabil Bassim, Adam L. Friedman, Robert M. Wallace, Chaoxing Liu, Nitin Samarth, Vincent H. Crespi, Joshua A. Robinson
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Abstract: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.
Comments: 27 pages, 5 figures. Supporting Information included (16 pages, 14 figures, 1 table)
Subjects: Materials Science (cond-mat.mtrl-sci)
Cite as: arXiv:2205.06859 [cond-mat.mtrl-sci]
  (or arXiv:2205.06859v4 [cond-mat.mtrl-sci] for this version)
  https://doi.org/10.48550/arXiv.2205.06859
Journal reference: ACS Nano 2024, 18, 33, 21985-21997
Related DOI: https://doi.org/10.1021/acsnano.4c04075

Submission history

From: Alexander Vera [view email]
[v1] Fri, 13 May 2022 19:11:18 UTC (4,135 KB)
[v2] Fri, 15 Jul 2022 13:46:31 UTC (6,657 KB)
[v3] Wed, 27 Mar 2024 19:35:42 UTC (3,508 KB)
[v4] Tue, 20 Aug 2024 13:54:34 UTC (4,438 KB)
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