Perfect spin and valley polarized quantum transport in twisted SiC nanoribbons
文献类型：期刊论文
| 作者 | Zheng,Xiaohong1,2,3 ; Chen,Xiaobin2; Zhang,Lei2,4,5; Xiao,Liantuan4,5; Jia,Suotang4,5; Zeng,Zhi1,3; Guo,Hong2,6
|
| 刊名 | 2D Materials
 |
| 出版日期 | 2017-02-01 |
| 卷号 | 4 |
| 关键词 | spin polarization valley polarization electron transport DFT-NEGF SiC nanoribbon half-metallicity |
| ISSN号 | 2053-1583 |
| DOI | 10.1088/2053-1583/aa598d |
| 英文摘要 | Abstract The edge magnetism of zigzag SiC nanoribbons in its ground state is half-metallic, but is competed by a non-half-metal state that is energetically extremely close. In this work, we propose and theoretically analyze two-probe transport junctions that overcome this difficulty so that perfect half-metal quantum transport is realized. When two zigzag SiC nanoribbons are connected by a C–Si–C–Si tetramer where the right ribbon is turned by 180° around the transport direction, 100% spin polarization with nearly perfect transmission is obtained due to perfect momentum k-matching across the transport junction. We show such a transport to be independent of the magnetic configurations of the two ribbons. A concomitant property is that 100% valley polarized charge transport is achieved. In principle, the structure of the proposed transport junction turns SiC nanoribbons into a promising, robust, and essentially perfect spin and valley filter. |
| 语种 | 英语 |
| WOS记录号 | IOP:2053-1583-4-2-AA598D |
| 出版者 | IOP Publishing |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/42902]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 作者单位 | 1.Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China 2.Department of Physics, Center for the Physics of Materials, McGill University, Montreal, Quebec H3A 2T8, Canada 3.University of Science and Technology of China, Hefei 230026, People’s Republic of China 4.State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, People’s Republic of China 5.Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, People’s Republic of China 6.School of Physics and Energy, Shenzhen University, Shenzhen 518060, People’s Republic of China |
| 推荐引用方式 GB/T 7714 | Zheng,Xiaohong,Chen,Xiaobin,Zhang,Lei,et al. Perfect spin and valley polarized quantum transport in twisted SiC nanoribbons[J]. 2D Materials,2017,4. |
| APA | Zheng,Xiaohong.,Chen,Xiaobin.,Zhang,Lei.,Xiao,Liantuan.,Jia,Suotang.,...&Guo,Hong.(2017).Perfect spin and valley polarized quantum transport in twisted SiC nanoribbons.2D Materials,4. |
| MLA | Zheng,Xiaohong,et al."Perfect spin and valley polarized quantum transport in twisted SiC nanoribbons".2D Materials 4(2017). |
入库方式： OAI收割
来源：合肥物质科学研究院
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。