Spin-polarized current induced by a local exchange field in a silicene nanoribbon
A mechanism to generate a spin-polarized current in a two-terminal zigzag silicene nanoribbon is predicted. When a weak local exchange field that is parallel to the surface of silicene is applied on one of edges of the silicene nanoribbon, a gap is opened in the corresponding edge states but another...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2012-01-01
|
| Series: | New Journal of Physics |
| Online Access: | https://doi.org/10.1088/1367-2630/14/8/083039 |
| _version_ | 1797751620673470464 |
|---|---|
| author | Xing-Tao An Yan-Yang Zhang Jian-Jun Liu Shu-Shen Li |
| author_facet | Xing-Tao An Yan-Yang Zhang Jian-Jun Liu Shu-Shen Li |
| author_sort | Xing-Tao An |
| collection | DOAJ |
| description | A mechanism to generate a spin-polarized current in a two-terminal zigzag silicene nanoribbon is predicted. When a weak local exchange field that is parallel to the surface of silicene is applied on one of edges of the silicene nanoribbon, a gap is opened in the corresponding edge states but another pair of gapless edge states with opposite spin are still protected by the time-reversal symmetry. Hence, a spin-polarized current can be induced in the gap opened by the local exchange field in this two-terminal system. What is important is that the spin-polarized current can be obtained even in the absence of Rashba spin–orbit coupling and in the case of the very weak exchange field. That is to say, the mechanism to generate the spin-polarized currents can be easily realized experimentally. We also find that the spin-polarized current is insensitive to weak disorder. |
| first_indexed | 2024-03-12T16:51:11Z |
| format | Article |
| id | doaj.art-fc996507ae41442294718fe43632adb4 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:51:11Z |
| publishDate | 2012-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-fc996507ae41442294718fe43632adb42023-08-08T11:11:13ZengIOP PublishingNew Journal of Physics1367-26302012-01-0114808303910.1088/1367-2630/14/8/083039Spin-polarized current induced by a local exchange field in a silicene nanoribbonXing-Tao An0Yan-Yang Zhang1Jian-Jun Liu2Shu-Shen Li3SKLSM, Institute of Semiconductors , Chinese Academy of Sciences, PO Box 912, Beijing 100083, China; School of Sciences, Hebei University of Science and Technology , Shijiazhuang, Hebei 050018, ChinaSKLSM, Institute of Semiconductors , Chinese Academy of Sciences, PO Box 912, Beijing 100083, China; International Center for Quantum Materials, Peking University , Beijing 100871, ChinaPhysics Department, Shijiazhuang University , Shijiazhuang 050035, ChinaSKLSM, Institute of Semiconductors , Chinese Academy of Sciences, PO Box 912, Beijing 100083, ChinaA mechanism to generate a spin-polarized current in a two-terminal zigzag silicene nanoribbon is predicted. When a weak local exchange field that is parallel to the surface of silicene is applied on one of edges of the silicene nanoribbon, a gap is opened in the corresponding edge states but another pair of gapless edge states with opposite spin are still protected by the time-reversal symmetry. Hence, a spin-polarized current can be induced in the gap opened by the local exchange field in this two-terminal system. What is important is that the spin-polarized current can be obtained even in the absence of Rashba spin–orbit coupling and in the case of the very weak exchange field. That is to say, the mechanism to generate the spin-polarized currents can be easily realized experimentally. We also find that the spin-polarized current is insensitive to weak disorder.https://doi.org/10.1088/1367-2630/14/8/083039 |
| spellingShingle | Xing-Tao An Yan-Yang Zhang Jian-Jun Liu Shu-Shen Li Spin-polarized current induced by a local exchange field in a silicene nanoribbon New Journal of Physics |
| title | Spin-polarized current induced by a local exchange field in a silicene nanoribbon |
| title_full | Spin-polarized current induced by a local exchange field in a silicene nanoribbon |
| title_fullStr | Spin-polarized current induced by a local exchange field in a silicene nanoribbon |
| title_full_unstemmed | Spin-polarized current induced by a local exchange field in a silicene nanoribbon |
| title_short | Spin-polarized current induced by a local exchange field in a silicene nanoribbon |
| title_sort | spin polarized current induced by a local exchange field in a silicene nanoribbon |
| url | https://doi.org/10.1088/1367-2630/14/8/083039 |
| work_keys_str_mv | AT xingtaoan spinpolarizedcurrentinducedbyalocalexchangefieldinasilicenenanoribbon AT yanyangzhang spinpolarizedcurrentinducedbyalocalexchangefieldinasilicenenanoribbon AT jianjunliu spinpolarizedcurrentinducedbyalocalexchangefieldinasilicenenanoribbon AT shushenli spinpolarizedcurrentinducedbyalocalexchangefieldinasilicenenanoribbon |