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First principle study of edge topological defect-modulated electronic and magnetic properties in zigzag graphene nanoribbons |
Lu-Ting Huang(黄露婷), Zheng Chen(陈铮), Yong-Xin Wang(王永欣), Yan-Li Lu(卢艳丽) |
State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China |
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Abstract Zigzag graphene nanoribbon (ZGNR) is a promising candidate for next-generation spintronic devices. Development of the field requires potential systems with variable and adjustable electromagnetic properties. Here we show a detailed investigation of ZGNR decorated with edge topological defects (ED-ZGNR) synthesized in laboratory by Ruffieux in 2015[Pascal Ruffieux, Shiyong Wang, Bo Yang, et al. 2015 Nature 531 489]. The pristine ED-ZGNR in the ground state is an antiferromagnetic semiconductor, and the acquired band structure is significantly changed compared with that of perfect ZGNR. After doping heteroatoms on the edge, the breaking of degeneration of band structure makes the doped ribbon a half-semi-metal, and nonzero magnetic moments are induced. Our results indicate the tunable electronic and magnetic properties of ZGNR by deriving unique edge state from topological defect, which opens a new route to practical nano devices based on ZGNR.
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Received: 11 May 2017
Revised: 30 June 2017
Accepted manuscript online:
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PACS:
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31.15.es
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(Applications of density-functional theory (e.g., to electronic structure and stability; defect formation; dielectric properties, susceptibilities; viscoelastic coefficients; Rydberg transition frequencies))
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32.10.Dk
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(Electric and magnetic moments, polarizabilities)
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31.15.ej
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(Spin-density functionals)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 51474176, 51674205, 51575452, and 51475378). |
Corresponding Authors:
Lu-Ting Huang
E-mail: hlt0922@mail.nwpu.edu.cn
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Cite this article:
Lu-Ting Huang(黄露婷), Zheng Chen(陈铮), Yong-Xin Wang(王永欣), Yan-Li Lu(卢艳丽) First principle study of edge topological defect-modulated electronic and magnetic properties in zigzag graphene nanoribbons 2017 Chin. Phys. B 26 103103
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