Spin-filtering and rectifying effects for Al-doped zigzag-edged silicene nanoribbons with asymmetric edge hydrogenation
| Autor: | Z.Q. Fan, C.X. Li, Lixian Sun, G.P. Tang, Zhen-Hua Zhang, Xiao-Qing Deng |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Condensed matter physics Spintronics Silicene Doping Non-equilibrium thermodynamics 02 engineering and technology General Chemistry Edge (geometry) 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Biomaterials Zigzag 0103 physical sciences Materials Chemistry Condensed Matter::Strongly Correlated Electrons Density functional theory Electrical and Electronic Engineering 010306 general physics 0210 nano-technology Spin-½ |
| Zdroj: | Organic Electronics. 32:41-46 |
| ISSN: | 1566-1199 |
| DOI: | 10.1016/j.orgel.2016.01.036 |
| Popis: | Spin transport features of the Al-doping zigzag-edged silicene nanoribbons (ZSiNRs) are investigated by using the nonequilibrium Green's function method and the spin-polarized density functional theory, where ZSiNRs are Si–H 2 bonded at one edge while Si–H bonded at the other to form an asymmetric edge hydrogenation. It is found that a perfect spin filtering effect (100%) in such ZSiNRs can be achieved in the calculated bias region. The rectifying performance of spin-polarized currents with a ratio larger than 10 5 can be achieved by changing the position of the doping atoms. Moreover, the negative differential resistance (NDR) effect is also observed in the spin-polarized current. Our calculation suggests Al-doping ZSiNRs with the asymmetric edge hydrogenation hold promise for multifunctional spintronic devices. |
| Databáze: | OpenAIRE |
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