Flat Bands and Mechanical Deformation Effects in the Moire Superlattice of MoS2-WSe2 Heterobilayers
文献类型：期刊论文
| 作者 | Waters, Dacen1; Nie, Yifan2,3; Lupke, Felix1; Pan, Yi7,8; Foelsch, Stefan8; Lin, Yu-Chuan5,6; Jariwala, Bhakti5,6; Zhang, Kehao5,6; Wang, Chong1; Lv, Hongyan1,4 |
| 刊名 | ACS NANO
 |
| 出版日期 | 2020-06-23 |
| 卷号 | 14 |
| ISSN号 | 1936-0851 |
| 关键词 | van der Waals heterostructures transition-metal dichalcogenides scanning tunneling microscopy density functional theory moire flat bands |
| DOI | 10.1021/acsnano.0c03414 |
| 通讯作者 | Waters, Dacen(dwaters@andrew.cmu.edu) |
| 英文摘要 | 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. |
| WOS关键词 | MAGIC-ANGLE ; GRAPHENE ; HETEROSTRUCTURES |
| 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] |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| 出版者 | AMER CHEMICAL SOC |
| WOS记录号 | WOS:000543744100114 |
| 资助机构 | 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 |
| 源URL | [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.Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA 3.Univ Texas Dallas, Dept Mat Sci & Engn, Dallas, TX 75080 USA 4.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 5.Penn State Univ, Ctr 2 Dimens & Layered Mat, University Pk, PA 16802 USA 6.Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA 7.Xi An Jiao Tong Univ, Ctr Spintron & Quantum Syst, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China 8.Paul Drude Inst Festkorperelekt, D-10117 Berlin, Germany |
| 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). |
入库方式： OAI收割
来源：合肥物质科学研究院
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