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DOI | 10.1126/science.aao3503 |
Imaging of pure spin-valley diffusion current in WS2-WSe2 heterostructures | |
Jin, Chenhao1; Kim, Jonghwan1,2; Utama, M. Iqbal Bakti1,3; Regan, Emma C.1,4; Kleemann, Hans1; Cai, Hui5; Shen, Yuxia5; Shinner, Matthew James1; Sengupta, Arjun1; Watanabe, Kenji6; Taniguchi, Takashi6; Tongay, Sefaattin5; Zettl, Alex1,7,8,9; Wang, Feng1,7,8,9 | |
2018-05-25 | |
发表期刊 | SCIENCE
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ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2018 |
卷号 | 360期号:6391页码:893-896 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; South Korea; Japan |
英文摘要 | Transition metal dichalcogenide (TMDC) materials are promising for spintronic and valleytronic applications because valley-polarized excitations can be generated and manipulated with circularly polarized photons and the valley and spin degrees of freedom are locked by strong spin-orbital interactions. In this study we demonstrate efficient generation of a pure and locked spin-valley diffusion current in tungsten disulfide (WS2)-tungsten diselenide (WSe2) heterostructures without any driving electric field. We imaged the propagation of valley current in real time and space by pump-probe spectroscopy. The valley current in the heterostructures can live for more than 20 microseconds and propagate over 20 micrometers; both the lifetime and the diffusion length can be controlled through electrostatic gating. The high-efficiency and electric-field-free generation of a locked spin-valley current in TMDC heterostructures holds promise for applications in spin and valley devices. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000433039800044 |
WOS关键词 | MONOLAYER MOS2 ; POLARIZATION ; DYNAMICS |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/198748 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA; 2.Pohang Univ Sci & Technol, Dept Mat Sci & Engn, Pohang 790784, South Korea; 3.Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA; 4.Univ Calif Berkeley, Grad Grp Appl Sci & Technol, Berkeley, CA 94720 USA; 5.Arizona State Univ, Sch Engn Matter Transport & Energy, Tempe, AZ 85287 USA; 6.Natl Inst Mat Sci, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan; 7.Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA; 8.Univ Calif Berkeley, Kavli Energy NanoSci Inst, Berkeley, CA 94720 USA; 9.Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA |
推荐引用方式 GB/T 7714 | Jin, Chenhao,Kim, Jonghwan,Utama, M. Iqbal Bakti,et al. Imaging of pure spin-valley diffusion current in WS2-WSe2 heterostructures[J]. SCIENCE,2018,360(6391):893-896. |
APA | Jin, Chenhao.,Kim, Jonghwan.,Utama, M. Iqbal Bakti.,Regan, Emma C..,Kleemann, Hans.,...&Wang, Feng.(2018).Imaging of pure spin-valley diffusion current in WS2-WSe2 heterostructures.SCIENCE,360(6391),893-896. |
MLA | Jin, Chenhao,et al."Imaging of pure spin-valley diffusion current in WS2-WSe2 heterostructures".SCIENCE 360.6391(2018):893-896. |
条目包含的文件 | 条目无相关文件。 |
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