Journal ArticleDOI
Double-resonant Raman scattering in graphite: Interference effects, selection rules, and phonon dispersion
TLDR
In this article, the authors present a comprehensive analysis of double-resonant Raman scattering in graphite and derive an analytical expression for the Raman cross section of the D mode in one dimension.Abstract:
We present a comprehensive analysis of double-resonant Raman scattering in graphite and derive an analytical expression for the Raman cross section of the D mode in one dimension. The extension to two dimensions does not change the double-resonant phonon wave vectors. In the full integration of the Raman cross section, the contributions by phonons from exactly the K point cancel due to destructive interference. We calculate the D mode explicitly based on recent experimental data of the graphite phonon dispersion. Applying the selection rules, a mapping of additional disorder-induced and second-order Raman modes onto the Brillouin zone of graphite is obtained. DOI: 10.1103/PhysRevB.70.155403read more
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Journal ArticleDOI
Raman spectroscopy of graphene and graphite: Disorder, electron phonon coupling, doping and nonadiabatic effects
TL;DR: In this article, the authors focus on the origin of the D and G peaks and the second order of D peak and show that the G and 2 D Raman peaks change in shape, position and relative intensity with number of graphene layers.
Journal ArticleDOI
Raman spectroscopy as a versatile tool for studying the properties of graphene
Andrea C. Ferrari,Denis M. Basko +1 more
TL;DR: The state of the art, future directions and open questions in Raman spectroscopy of graphene are reviewed, and essential physical processes whose importance has only recently been recognized are described.
Journal ArticleDOI
Raman spectroscopy in graphene
TL;DR: In this article, the authors discuss the first-order and double resonance Raman scattering mechanisms in graphene, which give rise to the most prominent Raman features and give special emphasis to the possibility of using Raman spectroscopy to distinguish a monolayer from few-layer graphene stacked in the Bernal configuration.
Journal ArticleDOI
Quantifying defects in graphene via Raman spectroscopy at different excitation energies
Luiz Gustavo Cançado,Ado Jorio,E. H. Martins Ferreira,Fernando Stavale,Carlos A. Achete,Rodrigo B. Capaz,Marcus V. O. Moutinho,Antonio Lombardo,Tero S. Kulmala,Andrea C. Ferrari +9 more
TL;DR: It is found that the ratio between the D and G peak intensities, for a given defect density, strongly depends on the laser excitation energy, and a simple equation for the determination of the point defect density in graphene via Raman spectroscopy is presented.
Journal ArticleDOI
Quantifying defects in graphene via Raman spectroscopy at different excitation energies.
Luiz Gustavo Cançado,Ado Jorio,E. H. Martins Ferreira,Fernando Stavale,Carlos A. Achete,Rodrigo B. Capaz,Marcus V. O. Moutinho,Antonio Lombardo,Tero S. Kulmala,Andrea C. Ferrari +9 more
TL;DR: In this paper, a Raman study of Ar+-bombarded graphene samples with increasing ion doses was conducted and it was shown that the ratio between the D and G peak intensities strongly depends on the laser excitation energy.