| Title | Direct Visualization of Large-Scale Intrinsic Atomic Lattice Structure and Its Collective Anisotropy in Air-Sensitive Monolayer 1T'- WTe2 |
| Authors | Niu, Kangdi Weng, Mouyi Li, Songge Guo, Zenglong Wang, Gang Han, Mengjiao Pan, Feng Lin, Junhao |
| Affiliation | Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China Southern Univ Sci & Technol, Shenzhen Key Lab Adv Quantum Funct Mat & Devices, Shenzhen 518055, Peoples R China Peking Univ, Shenzhen Grad Sch, Sch Adv Mat, Shenzhen 518055, Peoples R China |
| Keywords | PHOTOLUMINESCENCE GRAPHENE GAP |
| Issue Date | Aug-2021 |
| Publisher | ADVANCED SCIENCE |
| Abstract | Probing large-scale intrinsic structure of air-sensitive 2D materials with atomic resolution is so far challenging due to their rapid oxidization and contamination. Here, by keeping the whole experiment including growth, transfer, and characterizations in an interconnected atmosphere-control environment, the large-scale intact lattice structure of air-sensitive monolayer 1T'-WTe2 is directly visualized by atom-resolved scanning transmission electron microscopy. Benefit from the large-scale atomic mapping, collective lattice distortions are further unveiled due to the presence of anisotropic rippling, which propagates perpendicular to only one of the preferential lattice planes in the same WTe2 monolayer. Such anisotropic lattice rippling modulates the intrinsic point defect (Te vacancy) distribution, in which they aggregate at the constrictive inner side of the undulating structure, presumably due to the ripple-induced asymmetric strain as elaborated by density functional theory. The results pave the way for atomic characterizations and defect engineering of air-sensitive 2D layered materials. |
| URI | http://hdl.handle.net/20.500.11897/624383 |
| DOI | 10.1002/advs.202101563 |
| Indexed | SCI(E) |
| Appears in Collections: | 深圳研究生院待认领 |
