Spin transport properties of a carbon nanotube/zigzag graphene nanoribbon junction: a first principles investigation |
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| Authors: | Haiping Yu Jiming Zheng Ping Guo Zhiyong Zhang |
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| Affiliation: | 1. National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base), National Photoelectric Technology and Functional Materials and Application of Science and Technology International Cooperation Base, Northwest University, Xi’an, 710069, People’s Republic of China
2. School of Information Science and Technology, Northwest University, Xi’an, 710069, People’s Republic of China
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| Abstract: | A carbon nanotube (CNT)/zigzag graphene nanoribbons (ZGNRs) junctions has been proposed and investigated by first-principles calculations. The results show that large spin polarization of currents would be achieved when only one edge of ZGNR is coupled to the other lead. By virtue of spatial separation of edge state in two spin channel, one of those channels is opened at certain energy range and gives rise to spin-polarized currents under a low bias. This feature is stable whenever the ZGNR lead is under the antiferromagnetic ground states or is under the ferromagnetic states. Our findings indicate that this approach is simple and efficient for spintronics design. |
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