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Lattice reconstruction in MoSe$_2$-WSe$_2$ heterobilayers synthesized by chemical vapor deposition
- Publication Year :
- 2022
- Publisher :
- arXiv, 2022.
-
Abstract
- Vertical van der Waals heterostructures of semiconducting transition metal dichalcogenides realize moir\'e systems with rich correlated electron phases and moir\'e exciton phenomena. For material combinations with small lattice mismatch and twist angles as in MoSe$_2$-WSe$_2$, however, lattice reconstruction eliminates the canonical moir\'e pattern and instead gives rise to arrays of periodically reconstructed nanoscale domains and mesoscopically extended areas of one atomic registry. Here, we elucidate the role of atomic reconstruction in MoSe$_2$-WSe$_2$ heterostructures synthesized by chemical vapor deposition. With complementary imaging down to the atomic scale, simulations, and optical spectroscopy methods we identify the coexistence of moir\'e-type cores and extended moir\'e-free regions in heterostacks with parallel and antiparallel alignment. Our work highlights the potential of chemical vapor deposition for applications requiring laterally extended heterosystems of one atomic registry or exciton-confining heterostack arrays.<br />Comment: 10 pages, 5 figures
- Subjects :
- Condensed Matter - Materials Science
Condensed Matter - Mesoscale and Nanoscale Physics
Mechanical Engineering
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
Materials Science (cond-mat.mtrl-sci)
FOS: Physical sciences
General Materials Science
Bioengineering
General Chemistry
Condensed Matter Physics
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....92f4f3b07b6d9c0c851ef6637d9047ba
- Full Text :
- https://doi.org/10.48550/arxiv.2212.07686