Abstract

The realization of high-fidelity organic-inorganic quantum emulators is frequently hindered by interfacial imperfections introduced during device fabrication. Here, a robust nanofabrication protocol restores the atomic-scale purity of epitaxial graphene on SiC to UHV-equivalent levels, as confirmed by LEED and LEEM. This pristine interface enables excitonic coherence in epitaxial overlayers of 2,3,6,7,10,11-hexamethoxytriphenylene (HMTP). Through Fourier Transform Photocurrent Spectroscopy, photoluminescence, and dynamic Raman mapping, the authors resolve a vibronic manifold governed by Davydov splitting. They combine an analytical tight-binding model with ARPES-derived coupling and Raman vibrational modes validated by molecular dynamics simulations to quantify polarization energy, Huang-Rhys factor, and Herzberg-Teller corrections.

Abstract

The realization of high-fidelity organic-inorganic quantum emulators is frequently hindered by interfacial imperfections introduced during device fabrication. Here, a robust nanofabrication protocol restores the atomic-scale purity of epitaxial graphene on SiC to UHV-equivalent levels, as confirmed by LEED and LEEM. This pristine interface enables excitonic coherence in epitaxial overlayers of 2,3,6,7,10,11-hexamethoxytriphenylene (HMTP). Through Fourier Transform Photocurrent Spectroscopy, photoluminescence, and dynamic Raman mapping, the authors resolve a vibronic manifold governed by Davydov splitting. They combine an analytical tight-binding model with ARPES-derived coupling and Raman vibrational modes validated by molecular dynamics simulations to quantify polarization energy, Huang-Rhys factor, and Herzberg-Teller corrections.

Abstract

The realization of high-fidelity organic-inorganic quantum emulators is frequently hindered by interfacial imperfections introduced during device fabrication. Here, a robust nanofabrication protocol restores the atomic-scale purity of epitaxial graphene on SiC to UHV-equivalent levels, as confirmed by LEED and LEEM. This pristine interface enables excitonic coherence in epitaxial overlayers of 2,3,6,7,10,11-hexamethoxytriphenylene (HMTP). Through Fourier Transform Photocurrent Spectroscopy, photoluminescence, and dynamic Raman mapping, the authors resolve a vibronic manifold governed by Davydov splitting. They combine an analytical tight-binding model with ARPES-derived coupling and Raman vibrational modes validated by molecular dynamics simulations to quantify polarization energy, Huang-Rhys factor, and Herzberg-Teller corrections.

Abstract

The realization of high-fidelity organic-inorganic quantum emulators is frequently hindered by interfacial imperfections introduced during device fabrication. Here, a robust nanofabrication protocol restores the atomic-scale purity of epitaxial graphene on SiC to UHV-equivalent levels, as confirmed by LEED and LEEM. This pristine interface enables excitonic coherence in epitaxial overlayers of 2,3,6,7,10,11-hexamethoxytriphenylene (HMTP). Through Fourier Transform Photocurrent Spectroscopy, photoluminescence, and dynamic Raman mapping, the authors resolve a vibronic manifold governed by Davydov splitting. They combine an analytical tight-binding model with ARPES-derived coupling and Raman vibrational modes validated by molecular dynamics simulations to quantify polarization energy, Huang-Rhys factor, and Herzberg-Teller corrections.