Curvature effects in the D* band of small diameter carbon nanotubes

Autor:	Rudolf Pfeiffer, Viktor Zólyomi, Jenö Kürti, Hans Kuzmany, János Koltai, Ferenc Simon
Rok vydání:	2007
Předmět:	Oscillation Phonon Chemistry business.industry Carbon nanotube Soft modes Condensed Matter Physics Curvature Molecular physics Electronic Optical and Magnetic Materials law.invention symbols.namesake D band Optics law symbols business Raman spectroscopy Softening
Zdroj:	physica status solidi (b). 244:4261-4264
ISSN:	1521-3951 0370-1972
Popis:	The energy dispersion of the D* (G') band shows a strong diameter dependence according to Raman measurements on double walled carbon nanotubes. The Raman shift of the small diameter inner tubes shows an average softening. There is an oscillation around an average linear behavior with slopes of 108 cm -1 /eV and 61 cm -1 /eV for the outer and inner tubes, respectively. We show that the experimental observation can be reproduced by simple model calculations if the curvature effects are taken into account. The phonon softening with increasing curvature was proven by first principles calculations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c6e48be3e795d81dfeb29f37ab16c107 https://doi.org/10.1002/pssb.200776168 Zobrazit plný text záznamu Plný text