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. 2025 Jan 2;16:324. doi: 10.1038/s41467-024-54484-8

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© The Author(s) 2025

Open Access This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, which permits any non-commercial use, sharing, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if you modified the licensed material. You do not have permission under this licence to share adapted material derived from this article or parts of it. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by-nc-nd/4.0/.

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Fig. 4 — a Energy spectrum for the coupled tip-graphene-Cu tri-layer (tip-mono@Cu), plotted in ascending order. The combined spectrum of isolated tip and Cu-supported graphene (tip/mono@Cu), and the combined spectrum of isolated tip, isolated graphene and isolated Cu (tip/mono/Cu) are presented for comparison. The shaded areas in a correspond to the zoomed panels in b. b Zoomed spectra for the shadowed regions in a, and illustrations of coupled modes evidently shifted from corresponding uncoupled modes. The red arrows represent the dipole displacements of the atoms. Hydrogen atoms with minute dipole displacements are hidden for clarity.