| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Proximity Effect of Epitaxial Iron Phthalocyanine Molecules on High-Quality Graphene Devices |
| Haiyang Pan1†, Xiaobo Wang2†, Qiaoming Wang1, Xiaohua Wu1, Chang Liu1, Nian Lin2*, and Yue Zhao1,3* |
1Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
2Department of Physics, The Hong Kong University of Science and Technology, Hong Kong, China
3Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
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| Cite this article: |
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Haiyang Pan, Xiaobo Wang, Qiaoming Wang et al 2021 Chin. Phys. Lett. 38 087201 |
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Abstract Depositing magnetic insulators on graphene has been a promising route to introduce magnetism via exchange proximity interaction in graphene for future spintronics applications. Molecule-based magnets may offer unique opportunities because of their synthesis versatility. Here, we investigate the magnetic proximity effect of epitaxial iron phthalocyanine (FePc) molecules on high-quality monolayer and bilayer graphene devices on hexagonal boron nitride substrates by probing the local and nonlocal transport. Although the FePc molecules introduce large hole doping effects combined with mobility degradation, the magnetic proximity gives rise to a canted antiferromagnetic state under a magnetic field in the monolayer graphene. On bilayer graphene and FePc heterostructure devices, the nonlocal transport reveals a pronounced Zeeman spin-Hall effect. Further analysis of the scattering mechanism in the bilayer shows a dominated long-range scattering. Our findings in graphene/organic magnetic insulator heterostructure provide a new insight for use of molecule-based magnets in two-dimensional spintronic devices.
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Received: 13 May 2021
Editors' Suggestion
Published: 02 August 2021
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| Fund: Supported by the National Natural Science Foundation of China (Grant No. 11674150), the Key-Area Research and Development Program of Guangdong Province (Grant No. 2019B010931001), the Guangdong Innovative and Entrepreneurial Research Team Program (Grant No. 2016ZT06D348), the SUSTech CRF, and the Hong Kong RGC (Grant Nos. 16300617 and C6012-17E). |
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