Spin transport investigation of two type silicene nanoribbons heterostructure |
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Authors: | XQ Deng RQ Sheng |
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Institution: | School of Physics and Electronic Science, Changsha University of Science and Technology, Changsha 410114, China |
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Abstract: | Based on first principles calculation method, we design and investigate the spin transport properties of two type heterostructures based on zigzag silicene nanoribbons (ZSiNRs). The first one consists of hydrogen-terminated ZSiNR (ZSiNR-H) and Rx-terminated ZSiNR (ZSiNR-Rx), here, Rx = O, S, P. The rectification behavior can be observed for heterostructures consisting of ZSiNR-H and ZSiNR-O (ZSiNR-S). The second one can be fabricated with a ZSiNR-Rx central scatter region between two ZSiNR-H electrodes. The results show that this device could maintain its good spin filtering effect for ZSiNR-O model in parallel (P) and antiparallel (AP) spin configuration with large bias range. Then we further investigate the spin-dependent transport with various length of ZSiNR-O region, and find that better spin filtering effect (near 100% spin polarization) can be observed for longer ZSiNR-O region. ZSiNR-S model show analogous spin filtering effect. However, neither rectification behavior nor spin filtering effect arise for ZSiNR-P models. |
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Keywords: | Spin-filtering Heterostructure Silicene nanoribbons (ZSiNRs) |
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