Premium
Triple‐resonant two‐phonon Raman scattering in graphene
Author(s) -
Kupčić I.
Publication year - 2012
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.3003
Subject(s) - graphene , raman spectroscopy , raman scattering , phonon , x ray raman scattering , coupling (piping) , condensed matter physics , order (exchange) , scattering , molecular physics , intensity (physics) , photon , materials science , chemistry , physics , optics , nanotechnology , finance , economics , metallurgy
The triple‐resonant (TR) second‐order Raman scattering mechanism in graphene is re‐examined. It is shown that the magnitude of the TR contribution to the photon‐ G ′ mode coupling function in graphene is one order of magnitude larger than the widely accepted two‐resonant coupling. Enhancement of the order of 100 in the Raman intensity, with respect to the usual double‐resonant model, is found for the G ′ band in graphene, and is expected in the related sp 2 ‐based carbon materials, as well. Copyright © 2011 John Wiley & Sons, Ltd.