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\bibitem{Singh_etal2023} {\textquotedblleft}\textit{Two-dimensional halide Pb-perovskite-double perovskite epitaxial heterostructures}{\textquotedblright}. Singh A, Yuan B, Rahman MH, Yang H, De A, Park JY, Zhang S, Huang L, Mannodi-Kanakkithodi A, Pennycook TJ, Dou L, Journal of the American Chemical Society \textbf{145}, 19885 (2023).   http://doi.org/10.1021/JACS.3C06127

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