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Theory of infrared double-resonance Raman spectrum in graphene: the role of the zone-boundary electron-phonon enhancement

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arxiv 2310.09188 v2 pith:6GM7HNZV submitted 2023-10-13 cond-mat.mes-hall physics.comp-ph

Lorenzo Graziotto , Francesco Macheda , Thibault Sohier , Matteo Calandra , Francesco Mauri This is my paper · ORCID
classification cond-mat.mes-hallphysics.comp-ph
keywords enhancementgraphenedouble-resonanceelectron-phononinfraredramanspectrumtheoretical
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We theoretically investigate the double-resonance Raman spectrum of monolayer graphene down to infrared laser excitation energies. By using first-principles density functional theory calculations, we improve upon previous theoretical predictions based on conical models or tight-binding approximations, and rigorously justify the evaluation of the electron-phonon enhancement found in Ref. [Venanzi, T., Graziotto, L. et al., Phys. Rev. Lett. 130, 256901 (2023)]. We proceed to discuss the effects of such enhancement on the room temperature graphene resistivity, hinting towards a possible reconciliation of theoretical and experimental discrepancies.

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