Large-Area Intercalated 2D-Pb/Graphene Heterostructure as a Platform for Generating Spin-Orbit Torque
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arXiv
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2022
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| author | 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. |
| author_facet | 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. |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2205_06859 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Large-Area Intercalated 2D-Pb/Graphene Heterostructure as a Platform for Generating Spin-Orbit Torque 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. Materials Science 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. |
| title | Large-Area Intercalated 2D-Pb/Graphene Heterostructure as a Platform for Generating Spin-Orbit Torque |
| topic | Materials Science |
| url | https://arxiv.org/abs/2205.06859 |