Substrate dependent terahertz response of monolayer WS2

doi:10.1063/5.0006617

	Substrate dependent terahertz response of monolayer WS2
	Dong, H. M.2; Tao, Z. H.2; Li, L. L.3,4,5; Huang, F.6; Xu, W.1,7,8; Peeters, F. M.1,5,8
刊名	APPLIED PHYSICS LETTERS
	2020-05-18
卷号	116
ISSN号	0003-6951
DOI	10.1063/5.0006617
通讯作者	Xu, W.(wenxu_issp@aliyun.com)
英文摘要	We investigate experimentally the terahertz (THz) optoelectronic properties of monolayer (ML) tungsten disulfide (WS2) placed on different substrates using THz time-domain spectroscopy (TDS). We find that the THz optical response of n-type ML WS2 depends sensitively on the choice of the substrate. This dependence is found to be a consequence of substrate induced charge transfer, extra scattering centers, and electronic localization. Through fitting the experimental results with the Drude-Smith formula, we can determine the key sample parameters (e.g., the electronic relaxation time, electron density, and electronic localization factor) of ML WS2 on different substrates. The temperature dependence of these parameters is examined. Our results show that the THz TDS technique is an efficient non-contact method that can be utilized to characterize and investigate the optoelectronic properties of nano-devices based on ML WS2.
资助项目	Fundamental Research Funds for the Central Universities[2018GF09] ; National Natural Science foundation of China[U1930116] ; National Natural Science foundation of China[11574319]
WOS关键词	GRAPHENE
WOS研究方向	Physics
语种	英语
出版者	AMER INST PHYSICS
WOS记录号	WOS:000536282300001
资助机构	Fundamental Research Funds for the Central Universities ; National Natural Science foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/103195]
专题	中国科学院合肥物质科学研究院
通讯作者	Xu, W.
作者单位	1.Yunnan Univ, Sch Phys & Astron, Kunming 650091, Yunnan, Peoples R China 2.China Univ Min & Technol, Sch Mat Sci & Phys, Xuzhou 221116, Jiangsu, Peoples R China 3.Univ Duisburg Essen, Dept Phys, Lotharstr 1, D-47057 Duisburg, Germany 4.Univ Duisburg Essen, Ctr Nanointegrat, Lotharstr 1, D-47057 Duisburg, Germany 5.Univ Antwerp, Dept Phys, Groenenborgerlaan 171, B-2020 Antwerp, Belgium 6.China Univ Min & Technol, Low Carbon Energy Inst, Xuzhou 221116, Jiangsu, Peoples R China 7.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 8.Yunnan Univ, Yunnan Key Lab Quantum Informat, Kunming 650091, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Dong, H. M.,Tao, Z. H.,Li, L. L.,et al. Substrate dependent terahertz response of monolayer WS2[J]. APPLIED PHYSICS LETTERS,2020,116.
APA	Dong, H. M.,Tao, Z. H.,Li, L. L.,Huang, F.,Xu, W.,&Peeters, F. M..(2020).Substrate dependent terahertz response of monolayer WS2.APPLIED PHYSICS LETTERS,116.
MLA	Dong, H. M.,et al."Substrate dependent terahertz response of monolayer WS2".APPLIED PHYSICS LETTERS 116(2020).