Resonant Raman spectra of carbon nanotube bundles observed by perpendicularly polarized light
| Autor: | G. Dresselhaus, Riichiro Saito, Ado Jorio, M. S. Dresselhaus, A. G. Souza Filho, Jie Jiang, Ge. G. Samsonidze, Marcos A. Pimenta, Alexander Grüneis |
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| Rok vydání: | 2004 |
| Předmět: |
Valence (chemistry)
Materials science media_common.quotation_subject Physics::Medical Physics General Physics and Astronomy Carbon nanotube Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Thermal conduction Molecular physics Asymmetry law.invention Carbon nanotube quantum dot Condensed Matter::Materials Science symbols.namesake Nuclear magnetic resonance law symbols Perpendicular Density of states Physical and Theoretical Chemistry Raman spectroscopy media_common |
| Zdroj: | Chemical Physics Letters. 387:301-306 |
| ISSN: | 0009-2614 |
| DOI: | 10.1016/j.cplett.2004.02.034 |
| Popis: | We calculated the resonance condition for the radial breathing Raman mode for single wall carbon nanotube (SWNT) bundles for light polarization parallel and perpendicular to the tube axis. The radial breathing modes that are not observed in isolated SWNTs, but are observed in SWNT bundles, are assigned to a resonance process for light with perpendicular polarization. Asymmetry between the valence and conduction π energy bands becomes essential for obtaining resonance conditions. We find that due to a high joint density of states, armchair SWNTs have the largest optical transition intensities. |
| Databáze: | OpenAIRE |
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