Lattice Reconstruction in MoSe<sub>2</sub>-WSe<sub>2</sub> Heterobilayers Synthesized by Chemical Vapor Deposition.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 37141148.
- Also identified by DOI 10.1021/acs.nanolett.2c05094 and PMC identifier 10214437.
- Licence recorded as CC BY-NC-ND.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Vertical van der Waals heterostructures of semiconducting transition metal dichalcogenides realize moiré systems with rich correlated electron phases and moiré exciton phenomena. For material combinations with small lattice mismatch and twist angles as in MoSe<sub>2</sub>-WSe<sub>2</sub>, however, lattice reconstruction eliminates the canonical moiré 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<sub>2</sub>-WSe<sub>2</sub> heterostructures synthesized by chemical vapor deposition. With complementary imaging down to the atomic scale, simulations, and optical spectroscopy methods, we identify the coexistence of moiré-type cores and extended moiré-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.