TY - JOUR
T1 - Steplike dispersion of the intermediate-frequency Raman modes in semiconducting and metallic carbon nanotubes
AU - Fantini, C.
AU - Jorio, A.
AU - Souza, M.
AU - Saito, R.
AU - Samsonidze, Ge G.
AU - Dresselhaus, M. S.
AU - Pimenta, M. A.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2005/8/15
Y1 - 2005/8/15
N2 - Resonance Raman spectra of semiconducting and metallic single-wall carbon nanotube bundles have been investigated in the spectral range between 600 and 1100 cm-1, which is associated with intermediate frequency modes. A large range of nanotube diameters corresponding to HiPco and electric-arc samples (0.7-1.8 nm), and laser excitation energies between 1.62 and 2.71 eV have been used in the measurements. A rich set of peaks is observed, some of them independent of the excitation laser energy and some exhibiting a steplike dispersive behavior. The nondispersive peaks are assigned. The model proposed by Fantini [Phys. Rev. Lett. 93, 087401 (2004)] to explain the steplike dispersive behavior of the intermediate frequency modes is then extended to different SWNT diameters and different Eii transitions, including semiconducting and metallic SWNTs.
AB - Resonance Raman spectra of semiconducting and metallic single-wall carbon nanotube bundles have been investigated in the spectral range between 600 and 1100 cm-1, which is associated with intermediate frequency modes. A large range of nanotube diameters corresponding to HiPco and electric-arc samples (0.7-1.8 nm), and laser excitation energies between 1.62 and 2.71 eV have been used in the measurements. A rich set of peaks is observed, some of them independent of the excitation laser energy and some exhibiting a steplike dispersive behavior. The nondispersive peaks are assigned. The model proposed by Fantini [Phys. Rev. Lett. 93, 087401 (2004)] to explain the steplike dispersive behavior of the intermediate frequency modes is then extended to different SWNT diameters and different Eii transitions, including semiconducting and metallic SWNTs.
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U2 - 10.1103/PhysRevB.72.085446
DO - 10.1103/PhysRevB.72.085446
M3 - Article
AN - SCOPUS:33644946142
VL - 72
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 8
M1 - 085446
ER -