Anomalous enhancement of valley polarization in multilayer WS2 at room temperature.
文献类型：期刊论文
| 作者 | Su, Huimin; Wei, Chengrong; Deng, Aiying; Deng, Dongmei; Yang, Chunlei; Dai, Jun-Feng |
| 刊名 | NANOSCALE
 |
| 出版日期 | 2017 |
| 文献子类 | 期刊论文 |
| 英文摘要 | We probe the polarization of the "A" exciton photoluminescence from monolayer and multilayer WS2 at 10 K and 295 K under near-resonant and off-resonant conditions. The monolayer WS2 exhibits relatively low valley polarization, around 24% at 10 K and 8% at 295 K, while all multilayer WS2 samples show very high valley polarization, which is a more or less constant value of around 80% at 10 K under near-resonant excitation. At room temperature, it is observed experimentally that valley polarization in multilayer WS2 monotonously increases with shrinking of the indirect bandgap energy. The phonon-assisted intervalley scattering via the K-G-K(K') valleys is identified as the primary valley polarization relaxation channel, which could be gradually suppressed as the thickness increases, leading to a valley polarization of up to 70% in multilayer WS2 (>3 unit layers). |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| 源URL | [http://ir.siat.ac.cn:8080/handle/172644/11606]  |
| 专题 | 深圳先进技术研究院_集成所 |
| 作者单位 | NANOSCALE |
| 推荐引用方式 GB/T 7714 | Su, Huimin,Wei, Chengrong,Deng, Aiying,et al. Anomalous enhancement of valley polarization in multilayer WS2 at room temperature.[J]. NANOSCALE,2017. |
| APA | Su, Huimin,Wei, Chengrong,Deng, Aiying,Deng, Dongmei,Yang, Chunlei,&Dai, Jun-Feng.(2017).Anomalous enhancement of valley polarization in multilayer WS2 at room temperature..NANOSCALE. |
| MLA | Su, Huimin,et al."Anomalous enhancement of valley polarization in multilayer WS2 at room temperature.".NANOSCALE (2017). |
入库方式： OAI收割
来源：深圳先进技术研究院
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