Phonon linewidths and electron-phonon coupling in graphite and nanotubes

By M. Lazzeri, S. Piscanec, F. Mauri, Andrea C. Ferrari, John Robertson. 2005

299 citations recorded by the source corpus.

We show that electron-phonon coupling EPC is the major source of broadening for the Raman G and G � peaks in graphite and metallic nanotubes. This allows us to directly measure the optical-phonon EPCs from the G and Glinewidths. The experimental EPCs compare extremely well with those from the density functional theory. We show that the EPC explains the difference in the Raman spectra of metallic and semiconducting nanotubes and their dependence on tube diameter. We dismiss the common assignment of the Gpeak in metallic nanotubes to a resonance between phonons and plasmons and we attribute it to a resonance between phonons and electron-hole pairs. For metallic tubes, we assign the G + and Gpeaks to TO circumferential

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/ad57d56d843822d5334da30ec4f40cacfeac3940

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In Atomic and Molecular Physics, and Optics

In Materials Chemistry

Citations in the corpus

G' band Raman spectra of single, double and triple layer graphene (2009, background): “Here, Mop and Mel ph are the electron–photon [19,20] and the electron–phonon [21,22] matrix elements, respectively, while j; a; b, and c, respectively, denote an initial state in the valence band, an excited state in the conduction band, a first scattered state, and a second scattered state of an ex”
Born-Oppenheimer Breakdown in Graphene (2006, background): “6 (eV)(2)/Å is the deformation potential of the E2g mode [27].”
The influence of thermal annealing to remove polymeric residue on the electronic doping and morphological characteristics of graphene (2013, background): “…boundaries or vacancies, edges, and functionalized groups, have the effect of increasing D and D 0 peak intensity (I D , I D 0 ), decreasing G 0 band intensity (I G 0 ) and increasing (broadening) the G [27] [29] [32] [41] and the G 0 [27] full width at half-maximum, or linewidths (C G 0 , C G ).”
Disorder in ball-milled graphite revealed by Raman spectroscopy (2013, background): “and conductivity of the materials [18].”
The shear mode of multilayer graphene. (2011, background): “In the absence of doping, FWHM(G)∼12-14cm−1 in SLG and bulk graphite, mostly due to the dominant EPC contribution[33, 34], the phonon-phonon one being∼1.”