ArticleNano letters2026
Vibronic and Excitonic Structure of a Template-Engineered Molecular-Graphene Heterostructure.
Article in Nano letters, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
1 citing paper in PubMed.
- Interfacial Coupling Controls Molecular Epitaxy of HMTP on Graphene/SiC.ACS applied materials & interfaces · 2026Article
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Authors and funding
9 authors.
Funding
Abstract
Strong electron-phonon coupling described by the Holstein Hamiltonian governs the optical response of many molecular quantum materials. Here, we investigate epitaxial overlayers of 2,3,6,7,10,11-hexamethoxytriphenylene grown on graphene/SiC using Fourier transform photocurrent spectroscopy, photoluminescence, Raman spectroscopy, angle-resolved photoemission spectroscopy, and surface-sensitive microscopy. We resolve a vibronic manifold consistent with Davydov splitting arising from the P63/m crystal symmetry, which lifts the highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) degeneracy into bright and dark excitonic branches. Using a tight-binding model parametrized by experiment, we determine the intermolecular coupling, polarization energy, Huang-Rhys factor, and Herzberg-Teller corrections to the Franck-Condon model. The results indicate polaron-mediated relaxation into the lower-energy branch, consistent with Kasha's rule. The developed graphene-supported molecular heterostructure provides a scalable platform for studying dark excitons and vibronic coupling in organic quantum materials.
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