Ultrafast Exciton and Spin Dynamics of Monolayer MoSi2N4 Studied by Non-Degenerate Pump-Probe Transient Transmission Spectroscopy
文献类型：期刊论文
| 作者 | Wu, Huiping1; Sun, Su2; Xu, Chuan2; Chen, Ke1,3; Ren, Wencai2; Lai, Tianshu1 |
| 刊名 | ADVANCED SCIENCE
 |
| 出版日期 | 2025-03-07 |
| 页码 | 9 |
| 关键词 | exciton dynamics monolayer MoSi2N4 spin dynamics time-resolved Faraday rotation spectroscopy transient differential transmission spectroscopy |
| DOI | 10.1002/advs.202417209 |
| 通讯作者 | Chen, Ke(chenk35@mail.sysu.edu.cn) ; Ren, Wencai(wcren@imr.ac.cn) ; Lai, Tianshu(stslts@mail.sysu.edu.cn) |
| 英文摘要 | 2D materials have attracted numerous attention for their potential applications in nano-photoelectronic and valleytronic devices. Recently, a new 2D material, MoSi2N4 monolayer, is synthesized and reported, and predicted to have many unique properties. Here, its ultrafast photoelectron and spin dynamics using femtosecond-resolved transient differential transmission and Faraday rotation spectroscopies are investigated. Complex and diverse ultrafast dynamics of excitons are observed with increasing probe wavelength from 510 to 640 nm, including fully positive and negative monotonic decaying dynamics as well as an initial positive (negative) peak followed by slow negative (positive) recovery dynamics, and are explained well based on the band structure of MoSi2N4 monolayer containing a deep defect level locating above the midpoint of direct bandgap at K valley. Spin polarization of A and B excitons is found controlled by the circular helicity of exciting light. The spin relaxation lifetime of B excitons is determined as approximate to 0.73 ps. |
| 资助项目 | National Key R&D Program of China ; National Natural Science Foundation of China[12074441] ; National Natural Science Foundation of China[52188101] ; National Natural Science Foundation of China[52122202] ; National Natural Science Foundation of China[52176173] ; LiaoNing Revitalization Talents Program[XLYC2201003] ; Special Projects of the Central Government in Guidance of Local Science and Technology Development[2024010859-JH6/1006] ; Guangdong Innovative and Entrepreneurial Research Team Program[2021ZT09L227] ; Fundamental Research Funds for the Central Universities[22hytd08] ; Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices[2022B1212010008] ; [2021YFA1400804] |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001439123000001 |
| 出版者 | WILEY |
| 资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China ; LiaoNing Revitalization Talents Program ; Special Projects of the Central Government in Guidance of Local Science and Technology Development ; Guangdong Innovative and Entrepreneurial Research Team Program ; Fundamental Research Funds for the Central Universities ; Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Chen, Ke; Ren, Wencai; Lai, Tianshu |
| 作者单位 | 1.Sun Yat Sen Univ, Sch Phys, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Sun Yat Sen Univ, Ctr Neutron Sci & Technol, Sch Phys, Guangdong Prov Key Lab Magnetoelectr Phys & Device, Guangzhou 510275, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Huiping,Sun, Su,Xu, Chuan,et al. Ultrafast Exciton and Spin Dynamics of Monolayer MoSi2N4 Studied by Non-Degenerate Pump-Probe Transient Transmission Spectroscopy[J]. ADVANCED SCIENCE,2025:9. |
| APA | Wu, Huiping,Sun, Su,Xu, Chuan,Chen, Ke,Ren, Wencai,&Lai, Tianshu.(2025).Ultrafast Exciton and Spin Dynamics of Monolayer MoSi2N4 Studied by Non-Degenerate Pump-Probe Transient Transmission Spectroscopy.ADVANCED SCIENCE,9. |
| MLA | Wu, Huiping,et al."Ultrafast Exciton and Spin Dynamics of Monolayer MoSi2N4 Studied by Non-Degenerate Pump-Probe Transient Transmission Spectroscopy".ADVANCED SCIENCE (2025):9. |
入库方式： OAI收割
来源：金属研究所
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