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Detail study of the Raman‐active modes in carbon nanotubes
Author(s) -
Mohr M.,
Machón M.,
Thomsen C.,
Milošević I.,
Damnjanović M.
Publication year - 2007
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200776121
Subject(s) - anharmonicity , carbon nanotube , raman spectroscopy , phonon , coupling (piping) , materials science , molecular physics , molecular vibration , atomic physics , chemical physics , nanotechnology , condensed matter physics , chemistry , physics , quantum mechanics , composite material
The Raman‐active A 1 ‐modes in carbon nanotubes are often used for characterizing nanotube samples. The fully‐symmetric radial‐breathing mode and the high‐energy mode (HEM) have small non‐radial and non‐tangential components, respectively. Neglecting these components results in errors for phonon frequency and electron–phonon coupling calculations. We present a model to estimate these non‐radial components. For the HEM we find an anharmonicity that stems from the three‐fold coordination of the C atoms. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)