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

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

doi:10.1021/acsnano.4c04075

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

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 SamarthVincent 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 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.

Original language	English (US)
Pages (from-to)	21985-21997
Number of pages	13
Journal	ACS nano
Volume	18
Issue number	33
DOIs	https://doi.org/10.1021/acsnano.4c04075
State	Published - Aug 20 2024

All Science Journal Classification (ASJC) codes

General Materials Science
General Engineering
General Physics and Astronomy

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10.1021/acsnano.4c04075

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Vera, A., Zheng, B., Yanez, W., Yang, K., Kim, S. Y., Wang, X., Kotsakidis, J. C., El-Sherif, H., Krishnan, G., Koch, R. J., Bowen, T. A., Dong, C., Wang, Y., Wetherington, M., Rotenberg, E., Bassim, N., Friedman, A. L., Wallace, R. M., Liu, C., ... Robinson, J. A. (2024). Large-Area Intercalated Two-Dimensional Pb/Graphene Heterostructure as a Platform for Generating Spin-Orbit Torque. ACS nano, 18(33), 21985-21997. https://doi.org/10.1021/acsnano.4c04075

@article{9b9acf6a6a814f3ea88c753f33699489,

title = "Large-Area Intercalated Two-Dimensional Pb/Graphene Heterostructure as a Platform for Generating Spin-Orbit Torque",

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 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{\textquoteright}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.",

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

note = "Publisher Copyright: {\textcopyright} 2024 American Chemical Society",

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month = aug,

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doi = "10.1021/acsnano.4c04075",

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Vera, A, Zheng, B, Yanez, W, Yang, K, Kim, SY, Wang, X, Kotsakidis, JC, El-Sherif, H, Krishnan, G, Koch, RJ, Bowen, TA, Dong, C, Wang, Y, Wetherington, M, Rotenberg, E, Bassim, N, Friedman, AL, Wallace, RM, Liu, C , Samarth, N , Crespi, VH & Robinson, JA 2024, 'Large-Area Intercalated Two-Dimensional Pb/Graphene Heterostructure as a Platform for Generating Spin-Orbit Torque', ACS nano, vol. 18, no. 33, pp. 21985-21997. https://doi.org/10.1021/acsnano.4c04075

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AU - Vera, Alexander

AU - Zheng, Boyang

AU - Yanez, Wilson

AU - Yang, Kaijie

AU - Kim, Seong Yeoul

AU - Wang, Xinglu

AU - Kotsakidis, Jimmy C.

AU - El-Sherif, Hesham

AU - Krishnan, Gopi

AU - Koch, Roland J.

AU - Bowen, T. Andrew

AU - Dong, Chengye

AU - Wang, Yuanxi

AU - Wetherington, Maxwell

AU - Rotenberg, Eli

AU - Bassim, Nabil

AU - Friedman, Adam L.

AU - Wallace, Robert M.

AU - Liu, Chaoxing

AU - Samarth, Nitin

AU - Crespi, Vincent H.

AU - Robinson, Joshua A.

PY - 2024/8/20

Y1 - 2024/8/20

N2 - 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.

AB - 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.

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JF - ACS nano

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ER -

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

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