Proximity Effect of Epitaxial Iron Phthalocyanine Molecules on High-Quality Graphene Devices

• 作者: Haiyang Pan Xiaobo Wang Qiaoming Wang Xiaohua Wu Chang Liu Nian Lin Yue Zhao
• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2021,（8）
• 所属期刊栏目: CONDENSED MATTER:ELECTRONIC STRUCTURE,ELECTRICAL,MAGNETIC,AND OPTICAL PROPERTIES
• 页码范围: 114-131
• 页数: 18页
• 语种: 英文
• DOI: 10.1088/0256-307X/38/8/087201

摘要

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.