scholarly journals RAMAN SPECTRUM STUDY OF PHONON MODES FOR SINGLE-WALL CARBON NANOTUBES

1999 ◽  
Vol 48 (2) ◽  
pp. 273
Author(s):  
LI HONG-NIAN ◽  
XU YA-BO ◽  
LI HAI-YANG ◽  
HE PEI-MO ◽  
BAO SHI-NING
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectrum ◽  
Single Wall Carbon Nanotubes ◽  
Phonon Modes ◽  
Single Wall Carbon

Stoichiometry dependence of the Raman spectrum of Li-doped single-wall carbon nanotubes

2002 ◽  
Vol 323 (1-4) ◽  
pp. 259-261 ◽  
Author(s):  
N. Bendiab ◽  
E. Anglaret ◽  
J.-L. Bantignies ◽  
J.L. Sauvajol ◽  
P. Petit ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectrum ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon

scholarly journals PHONON DISPERSION IN CHIRAL SINGLE-WALL CARBON NANOTUBES

2007 ◽  
Vol 21 (25) ◽  
pp. 1667-1676 ◽  
Author(s):  
WEIHUA MU ◽  
ANTHONY NICKOLAS VAMIVAKAS ◽  
YAN FANG ◽  
BOLIN WANG
Keyword(s):  
Carbon Nanotubes ◽  
Phonon Dispersion ◽  
Unit Cell ◽  
Single Wall Carbon Nanotubes ◽  
Phonon Modes ◽  
Single Wall Carbon

The method to obtain phonon dispersion of achiral single-wall carbon nanotubes (SWNTs) from 6×6 matrix proposed by Mahan and Jeon7 has been extended to chiral SWNTs. The number of calculated phonon modes of a chiral SWNT (10, 1) is much larger than that of a zigzag one (10, 0) because the number of atoms in the translational unit cell of chiral SWNT is larger than that of an achiral one even though they have relative similar radius. The possible application of our approach to other models with more phonon potential terms beyond Mahan and Jeon's model is discussed.

D-band Raman Spectra of Graphite and Single Wall Carbon Nanotubes

2001 ◽  
Vol 706 ◽  
Author(s):  
R. Saito ◽  
A. Grueneis ◽  
L. G. Cançcado ◽  
M. A. Pimenta ◽  
A. Jorio ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectra ◽  
Phonon Dispersion ◽  
Resonance Raman ◽  
Dispersion Relations ◽  
Single Wall Carbon Nanotubes ◽  
Phonon Modes ◽  
Single Wall Carbon ◽  
Resonance Raman Spectra ◽  
Phonon Dispersion Relations

AbstractThe double resonance Raman spectra of the disorder-induced D-band and some other non-zone-center phonon modes are discussed for two-dimensional (2D) graphite and to some extent for single wall carbon nanotubes (SWNTs). The phonon dispersion relations of graphite can be determined using Raman spectroscopy b y measuring the non-zone center Raman phonon frequencies in combination with theoretically determined phonon q-vectors. We report a t of the phonon dispersion relations to experimental Raman spectra which were previously observed but have not y et been assigned to speci c phonon branches. We found that the D-band and the G0-band of 2D graphite consist of, respectively, two and one Raman Lorentzian peaks, while 3D graphite shows two G0-band Lorentzian peaks. The appearance of two G0 peaks in the resonance Raman spectra of SWNTs may come from resonances of one laser line with two di erent van Hov e singularities.

On the Raman Spectrum of Nanobundles of Single Wall Carbon Nanotubes

1999 ◽  
Vol 593 ◽  
Author(s):  
L. Alvarez ◽  
A. Righi ◽  
S. Rols ◽  
E. Anglaret ◽  
J.L. Sauvajol
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectrum ◽  
Pair Potential ◽  
Radial Breathing Mode ◽  
Diameter Distribution ◽  
Single Wall Carbon Nanotubes ◽  
Diffraction Spectrum ◽  
Covalent Bonds ◽  
Breathing Mode ◽  
Single Wall Carbon

ABSTRACTRaman scattering is used to study the structure and electronic properties of bundles of single wall carbon nanotubes. A relation between the tube diameter and the radial breathing mode frequency is derived by combining a description of the covalent bonds inside each nanotube via force constant model with a pair-potential approach to deal with the van der Waals interaction between nanotubes. In the framework of this approach a good agreement is evidenced between the diameter distribution derived from the A1g radial breathing mode frequencies and the one obtained from the analysis of the neutron diffraction spectrum. On the other hand, an investigation of the intermediate frequency range (600-1100 cm-1) of the Raman spectrum is reported. A dependence of the frequency of the modes with the excitation energy is clearly evidenced and assigned to a mode coupling.

Stoichiometry dependence of the Raman spectrum of alkali-doped single-wall carbon nanotubes

2001 ◽  
Vol 64 (24) ◽  
Author(s):  
N. Bendiab ◽  
E. Anglaret ◽  
J.-L. Bantignies ◽  
A. Zahab ◽  
J. L. Sauvajol ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectrum ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon

Band-Gap Modulation and Kohn Anomalies in Two-Dimensional Graphite and Single-Wall Carbon Nanotubes

2006 ◽  
Vol 963 ◽  
Author(s):  
Georgii Samsonidze ◽  
Eduardo B. Barros ◽  
Hyungbin Son ◽  
Riichiro Saito ◽  
Gene Dresselhaus ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Band Gap ◽  
Graphene Sheet ◽  
Phonon Mode ◽  
Single Wall Carbon Nanotubes ◽  
Two Dimensional ◽  
Phonon Modes ◽  
Single Wall Carbon ◽  
Electron Phonon Coupling ◽  
Band Gap Modulation

ABSTRACTThe electron-phonon coupling in two-dimensional graphite (graphene sheet) and metallic single-wall carbon nanotubes (SWNTs) is analyzed. In the graphene sheet the G-band phonon mode induces oscillations of the Fermi points, while the G′-band phonon mode opens a dynamical (oscillating with the phonon frequency) band gap, and accordingly, both phonon modes exhibit Kohn anomalies. Similarly, truly metallic armchair SWNTs undergo Peierls transitions driven by the G−- and G′-band phonon modes both of which open a dynamical band gap. In addition, the dynamical band gap induces a non-linear dependence of the phonon frequencies on the doping level and gives rise to strong anharmonic effects in the graphene sheet and metallic SWNTs.

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