Perfect spin-filtering in p-aminophenol functionalized zigzag graphene nanoribbons: The role of sp3 hybridized nitrogen |
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Institution: | 1. School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China;2. Institute of Theoretical Physics and Astrophysics, Department of Physics, Xiamen University, Xiamen 361005, China;3. Department of Electrical and Information Engineering, Hunan Institute of Engineering, Xiangtan 411101, China |
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Abstract: | Covalent functionalization of graphene is recently developed from the formation of sp3 hybridized carbon atom (sp3-C) to the sp3 hybridized nitrogen (sp3-N) at the anchoring site. Here, we investigated the electronic structures and transport properties of the zigzag graphene nanoribbons functionalized by covalently bonding of p-aminophenol (p-AP) molecule. First principles results demonstrate that the formed sp3-N plays a vital role in determining the electronic structure and transport properties of the system, resulting in a halfmetallic characteristic with a perfect spin-filtering behavior (100%). Interestingly, the performance of the spin-filtering is find to be insensitive to the sub-structures of the molecule. Our findings reveal the importance of sp3-N and suggest a new mechanism for realizing high-performance spin-filtering devices with functionalized graphene. |
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Keywords: | Graphene functionalization Nanoribbon Nitrogen hybridization Spin devices |
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