Rectifying performance in zigzag graphene nanoribbon heterojunctions with different edge hydrogenations |
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Authors: | Can Cao Ling-Na Chen Meng-Qiu Long Hui Xu |
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Affiliation: | 1. School of Physics and Electronics, Institute of Super Microstructure and Ultrafast Process, Central South University, Changsha 410083, China;2. School of Computer Science and Technology, University of South China, Hengyang 421001, China |
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Abstract: | Using nonequilibrium Green?s functions in combination with the density functional theory, we investigated the electronic transport behaviors of zigzag graphene nanoribbon (ZGNR) heterojunctions with different edge hydrogenations. The results show that electronic transport properties of ZGNR heterojunctions can be modulated by hydrogenations, and prominent rectification effects can be observed. We propose that the edge dihydrogenation leads to a blocking of electronic transfer, as well as the changes of the distribution of the frontier orbital at negative/positive bias might be responsible for the rectification effects. These results may be helpful for designing practical devices based on graphene nanoribbons. |
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Keywords: | Electronic transport property Zigzag graphene nanoribbon heterojunction Edge hydrogenation Rectifying effect |
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