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.

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.

Temperature dependence of the Raman spectra of single-wall carbon nanotubes

2000 ◽  
Vol 76 (15) ◽  
pp. 2053-2055 ◽  
Author(s):  
H. D. Li ◽  
K. T. Yue ◽  
Z. L. Lian ◽  
Y. Zhan ◽  
L. X. Zhou ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Temperature Dependence ◽  
Raman Spectra ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon

Dependence of the Second-order G'-band Profile on the Electronic Structure of Single-wal Nanotubes

2001 ◽  
Vol 706 ◽  
Author(s):  
A. G. Souza Filho ◽  
A. Joribo ◽  
G. Dresselhaus ◽  
M. S. Dresselhaus ◽  
A. K. Swan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electronic Structure ◽  
Raman Spectra ◽  
Density Of States ◽  
Resonance Raman ◽  
Second Order ◽  
Electronic Density ◽  
Van Hove Singularities ◽  
Band Profile ◽  
Resonance Raman Spectra

AbstractWe analyze the dependence of the second-order G'-band profile in terms of their (n,m) indices by measuring the resonance Raman spectra of several semiconducting and metalic isolated single wal carbon nanotubes. We show that this profile is very sensitive to the electronic structure, thus making it possible to get structural (n,m) information and to probe the splitting of the van Hove singularities in the electronic density of states due to the trigona warping effect.

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
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