TY - JOUR
T1 - Dispersive Raman spectra observed in graphite and single wall carbon nanotubes
AU - Saito, R.
AU - Jorio, A.
AU - Souza Filho, A. G.
AU - Grueneis, A.
AU - Pimenta, M. A.
AU - Dresselhaus, G.
AU - Dresselhaus, M. S.
N1 - Funding Information:
The authors deeply thank Prof. Ping-Heng Tan for providing his unpublished data on the lower frequency dispersive phonon modes. R.S. acknowledges UFMG for support of the visit, a Grant-in-Aid (No. 13440091) from the Ministry of Education, Japan. A.J./A.G.S.F. acknowledge support from the Brazilian agencies CNPq/CAPES. The MIT authors acknowledge support under NSF Grants DMR 01-16042, INT 98-15744, and INT 00-00408.
PY - 2002/10
Y1 - 2002/10
N2 - The disorder-induced D-band and some other non-zone center Raman modes of graphite and single wall carbon nanotubes are assigned to phonon modes in their respective Brillouin zones. In disordered graphite, the weak, dispersive phonon modes, which have been known but never assigned so far, are well described by the double resonance Raman process. All weak Raman peaks observed for sp2 carbons are useful for determining the phonon dispersion relations of graphite. In carbon nanotubes, all semiconducting nanotubes and some metallic nanotubes have van Hove singular k points for their electronic and phonon energy dispersion curves at the Γ point of the Brillouin zone. A corresponding Raman process is relevant to explain the observed D-band and intermediate frequency spectra.
AB - The disorder-induced D-band and some other non-zone center Raman modes of graphite and single wall carbon nanotubes are assigned to phonon modes in their respective Brillouin zones. In disordered graphite, the weak, dispersive phonon modes, which have been known but never assigned so far, are well described by the double resonance Raman process. All weak Raman peaks observed for sp2 carbons are useful for determining the phonon dispersion relations of graphite. In carbon nanotubes, all semiconducting nanotubes and some metallic nanotubes have van Hove singular k points for their electronic and phonon energy dispersion curves at the Γ point of the Brillouin zone. A corresponding Raman process is relevant to explain the observed D-band and intermediate frequency spectra.
KW - Carbon nanotubes
KW - D-band
KW - Dispersive phonon mode
KW - Double resonance
KW - Raman spectroscopy
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U2 - 10.1016/S0921-4526(02)00992-4
DO - 10.1016/S0921-4526(02)00992-4
M3 - Conference article
AN - SCOPUS:0036776432
VL - 323
SP - 100
EP - 106
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - 1-4
T2 - Proceedings of the Tsukuba Symposium on Carbon Nanotube in Com (CNT10)
Y2 - 3 October 2001 through 5 October 2001
ER -