Correction to: Communications Materials https://doi.org/10.1038/s43246-023-00435-7, published online 14 December 2023

In the original version of this Article, detailed information regarding the characterization of the Ir(111) crystal and the presence of surface impurities was missing, leading to concerns being raised about the sample quality and the potential impact on the paper's claims. We are thankful that these points were brought to our attention.

In the corrected version, we have clarified the origin of the Ir(111) substrate and specified the presence of residual graphene patches on its surface. In our study, we did not observe any h-BN nucleation on top of graphene, and h-BN nuclei cannot migrate across the terraces of Ir(111) due to the high diffusion barriers. Therefore, we believe that these step-attached graphene domains do not influence the nucleation behavior of h-BN on the Ir(111) surface.

The “Methods” section and Supplementary Information have been corrected as follows in both the HTML and PDF versions of the Article:

  • In Supplementary Fig. 1, dotted lines were added in order to outline the segregated graphene domains.

  • A new Supplementary Fig. 8 was added, showing the characterization of the Ir(111) crystal used in this study without the exposure to B- and N-contained precursors, and comparing non-contact atomic force microscopy images of graphene/Ir(111) and h-BN/Ir(111).

  • In the “Methods” section, “The characterization of the Ir(111) surface is demonstrated in Supplementary Fig. 8” was added.