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Resonant Raman Scattering in Carbon Nanotubes
Author(s) -
Thomsen C.,
Rafailov P.M.,
Jantoljak H.,
Reich S.
Publication year - 2000
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 - 10.1002/1521-3951(200007)220:1<561::aid-pssb561>3.0.co;2-t
Subject(s) - resonance (particle physics) , carbon nanotube , raman spectroscopy , raman scattering , materials science , excitation , atomic physics , range (aeronautics) , x ray raman scattering , molecular physics , scattering , optics , nanotechnology , chemistry , physics , composite material , quantum mechanics
We present resonant‐Raman scattering results on single and multi‐walled carbon nanotubes in the range 1.5 to 2.6 eV. In addition to the known resonance of metallic tubes with a maximum at ≈1.9 eV we determine the resonance profile of semiconducting single‐walled tubes. For a diameter of d 0 = 1.3 nm it has a flat minimum between 1.8 and 2.3 eV and a resonance above and below that. For tubes with d _0 = 1.45 Å all resonance energies decrease by about 0.1 eV. For multi‐walled tubes a monotonic increase in Raman intensity with excitation energy is observed which is explained as a smearing out of the square‐root singularities in the electronic density of states of 1D systems.