The synthesis and characterization of new [(BiSe)1.10]m[NbSe2]n, [(PbSe)1.10]m[NbSe2]n, [(CeSe)1.14]m[NbSe2]n and [(PbSe)1.12]m[TaSe2]n misfit layered compounds

Fifty-three new misfit layered compounds within the [(BiSe)1.10]m[NbSe2]n, [(PbSe)1.10]m[NbSe2]n, [(CeSe)1.14]m[NbSe2]n, and [(PbSe)1.12]m[TaSe2]n families of compounds were successfully synthesized. This is the first report of compounds with n and m larger than 3, as self-assembly from designed precursors allows compounds with particular n and m values to be selectively prepared. The compounds form as crystallographically aligned films, with the c-axis perpendicular to the substrate. The compounds are well ordered along the c-axis and in the ab plane, with shorter coherence lengths between the constituent layers. All 18 compounds that were measured were found to be metallic.

Graphical abstractThe synthesis and characterization of new [(BiSe)1.10]m[NbSe2]n, [(PbSe)1.10]m[NbSe2]n, [(CeSe)1.14]m[NbSe2]n, and [(PbSe)1.12]m[TaSe2]n misfit layered compounds.Figure optionsDownload full-size imageDownload as PowerPoint slide