%0 Journal Article
%A Venanzi, Tommaso
%A Graziotto, Lorenzo
%A Macheda, Francesco
%A Sotgiu, Simone
%A Ouaj, Taoufiq
%A Stellino, Elena
%A Fasolato, Claudia
%A Postorino, Paolo
%A Mišeikis, Vaidotas
%A Metzelaars, Marvin
%A Kögerler, Paul
%A Beschoten, Bernd
%A Coletti, Camilla
%A Roddaro, Stefano
%A Calandra, Matteo
%A Ortolani, Michele
%A Stampfer, Christoph
%A Mauri, Francesco
%A Baldassarre, Leonetta
%T Probing Enhanced Electron-Phonon Coupling in Graphene by Infrared Resonance Raman Spectroscopy
%J Physical review letters
%V 130
%N 25
%@ 0031-9007
%C College Park, Md.
%I APS
%M FZJ-2024-03010
%P 256901
%D 2023
%X We report on resonance Raman spectroscopy measurements with excitation photon energy down to 1.16 eV on graphene, to study how low-energy carriers interact with lattice vibrations. Thanks to the excitation energy close to the Dirac point at K, we unveil a giant increase of the intensity ratio between the double-resonant 2D and 2D′ peaks with respect to that measured in graphite. Comparing with fully ab initio theoretical calculations, we conclude that the observation is explained by an enhanced, momentum-dependent coupling between electrons and Brillouin zone-boundary optical phonons. This finding applies to two-dimensional Dirac systems and has important consequences for the modeling of transport in graphene devices operating at room temperature.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ 37418733
%U <Go to ISI:>//WOS:001026290400003
%R 10.1103/PhysRevLett.130.256901
%U https://juser.fz-juelich.de/record/1025621