中文版 | English
题名

Valley polarization in MoS2 monolayers by optical pumping

作者
通讯作者Cui, Xiaodong
发表日期
2012-08
DOI
发表期刊
ISSN
1748-3387
EISSN
1748-3395
卷号7期号:8页码:490-493
摘要
Most electronic devices exploit the electric charge of electrons, but it is also possible to build devices that rely on other properties of electrons. Spintronic devices, for example, make use of the spin of electrons(1,2). Valleytronics is a more recent development that relies on the fact that the conduction bands of some materials have two or more minima at equal energies but at different positions in momentum space(3-5). To make a valleytronic device it is necessary to control the number of electrons in these valleys, thereby producing a valley polarization(6-11). Single-layer MoS2 is a promising material for valleytronics because both the conduction and valence band edges have two energy-degenerate valleys at the corners of the first Brillouin zone(12). Here, we demonstrate that optical pumping with circularly polarized light can achieve a valley polarization of 30% in pristine monolayer MoS2. Our results, and similar results by Mak et al.(13), demonstrate the viability of optical valley control and valley-based electronic and optoelectronic applications in MoS2 monolayers.
相关链接[来源记录]
收录类别
SCI ; EI
语种
英语
重要成果
NI期刊 ; ESI高被引
学校署名
其他
资助项目
University Grant Council government of HKSAR[AoE/P-04/08] ; University Grant Council government of HKSAR[SEG_CUHK06]
WOS研究方向
Science & Technology - Other Topics ; Materials Science
WOS类目
Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号
WOS:000307359600006
出版者
EI入藏号
20192907185953
EI主题词
Electron devices ; Electrons ; Layered semiconductors ; Molybdenum compounds ; Monolayers ; Optical pumping ; Polarization
EI分类号
Geology:481.1
来源库
Web of Science
引用统计
被引频次[WOS]:3004
成果类型期刊论文
条目标识符http://kc.sustech.edu.cn/handle/2SGJ60CL/30420
专题理学院_物理系
作者单位
1.Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
2.S Univ Sci & Technol China, Dept Phys, Shenzhen 518055, Peoples R China
3.Univ Hong Kong, Ctr Theoret & Computat Phys, Hong Kong, Hong Kong, Peoples R China
4.Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA
推荐引用方式
GB/T 7714
Zeng, Hualing,Dai, Junfeng,Yao, Wang,et al. Valley polarization in MoS2 monolayers by optical pumping[J]. Nature Nanotechnology,2012,7(8):490-493.
APA
Zeng, Hualing,Dai, Junfeng,Yao, Wang,Xiao, Di,&Cui, Xiaodong.(2012).Valley polarization in MoS2 monolayers by optical pumping.Nature Nanotechnology,7(8),490-493.
MLA
Zeng, Hualing,et al."Valley polarization in MoS2 monolayers by optical pumping".Nature Nanotechnology 7.8(2012):490-493.
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