Flat Bands and Mechanical Deformation Effects in the Moire Superlattice of MoS2-WSe2 Heterobilayers

doi:10.1021/acsnano.0c03414

HFCAS OpenIR

	Flat Bands and Mechanical Deformation Effects in the Moire Superlattice of MoS2-WSe2 Heterobilayers
	Waters, Dacen 1; Nie, Yifan 2,3; Lupke, Felix 1; Pan, Yi 4,5; Foelsch, Stefan 4; Lin, Yu-Chuan 6,7; Jariwala, Bhakti 6,7; Zhang, Kehao 6,7; Wang, Chong 1; Lv, Hongyan 1,8; Cho, Kyeongjae 2; Xiao, Di 1; Robinson, Joshua A.6,7; Feenstra, Randall M.1
	2020-06-23
发表期刊	ACS NANO
ISSN	1936-0851
通讯作者	Waters, Dacen(dwaters@andrew.cmu.edu)
摘要	It has recently been shown that quantum-confined states can appear in epitaxially grown van der Waals material heterobilayers without a rotational misalignment (theta = 0 degrees), associated with flat bands in the Brillouin zone of the moire pattern formed due to the lattice mismatch of the two layers. Peaks in the local density of states and confinement in a MoS2/WSe2 system was qualitatively described only considering local stacking arrangements, which cause band edge energies to vary spatially. In this work, we report the presence of large in-plane strain variation across the moire unit cell of a theta = 0 degrees MoS2/WSe2 heterobilayer and show that inclusion of strain variation and out-of-plane displacement in density functional theory calculations greatly improves their agreement with the experimental data. We further explore the role of a twist angle by showing experimental data for a twisted MoS2/WSe2 heterobilayer structure with a twist angle of theta = 15 degrees, which exhibits a moire pattern but no confinement.
关键词	van der Waals heterostructures transition-metal dichalcogenides scanning tunneling microscopy density functional theory moire flat bands
DOI	10.1021/acsnano.0c03414
关键词[WOS]	MAGIC-ANGLE ; GRAPHENE ; HETEROSTRUCTURES
收录类别	SCI
语种	英语
资助项目	A. von Humboldt Foundation ; Center for Low-Energy Systems Technology (LEAST), one of six centers of STARnet, a Semiconductor Research Corporation program - Microelectronics Advanced Research Corporation (MARCO) ; Defense Advanced Research Projects Agency (DARPA) ; NSF[DMR-1626099] ; NSF[DMR-1809145] ; National Key R&D Program of China[2017YFA0206202] ; National Science Foundation of China[11704303] ; Department of Energy, Basic Energy Sciences[DE-SC0012509] ; China Scholarship Council[201904910165]
项目资助者	A. von Humboldt Foundation ; Center for Low-Energy Systems Technology (LEAST), one of six centers of STARnet, a Semiconductor Research Corporation program - Microelectronics Advanced Research Corporation (MARCO) ; Defense Advanced Research Projects Agency (DARPA) ; NSF ; National Key R&D Program of China ; National Science Foundation of China ; Department of Energy, Basic Energy Sciences ; China Scholarship Council
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000543744100114
出版者	AMER CHEMICAL SOC
引用统计	被引频次：36[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/71220
专题	中国科学院合肥物质科学研究院
通讯作者	Waters, Dacen
作者单位	1.Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA 2.Univ Texas Dallas, Dept Mat Sci & Engn, Dallas, TX 75080 USA 3.Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA 4.Paul Drude Inst Festkorperelekt, D-10117 Berlin, Germany 5.Xi An Jiao Tong Univ, Ctr Spintron & Quantum Syst, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China 6.Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA 7.Penn State Univ, Ctr 2 Dimens & Layered Mat, University Pk, PA 16802 USA 8.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Waters, Dacen,Nie, Yifan,Lupke, Felix,et al. Flat Bands and Mechanical Deformation Effects in the Moire Superlattice of MoS2-WSe2 Heterobilayers[J]. ACS NANO,2020,14.
APA	Waters, Dacen.,Nie, Yifan.,Lupke, Felix.,Pan, Yi.,Foelsch, Stefan.,...&Feenstra, Randall M..(2020).Flat Bands and Mechanical Deformation Effects in the Moire Superlattice of MoS2-WSe2 Heterobilayers.ACS NANO,14.
MLA	Waters, Dacen,et al."Flat Bands and Mechanical Deformation Effects in the Moire Superlattice of MoS2-WSe2 Heterobilayers".ACS NANO 14(2020).