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Breit-Wigner-Fano Lineshape Analysis of the angential G-band of Metallic Nanotubes

Published online by Cambridge University Press:  15 March 2011

Sandra D. Brown ,
Ado Jorio ,
Paola Corio ,
Mildred Dresselhaus ,
Gene Dresselhaus  and
Katrin Kneipp
Sandra D. Brown
Affiliation:
Department of Physics
Ado Jorio
Affiliation:
Department of Physics
Paola Corio
Affiliation:
Department of Physics
Mildred Dresselhaus
Affiliation:
Department of Physics Department of Electrical Engineering and Computer Science
Gene Dresselhaus
Affiliation:
FrancisBitter National Magnet Laboratory, Massach usetts nstitute of Technology, Cambridge, A 02139-4307
Katrin Kneipp
Affiliation:
Department of Electrical Engineering and Computer Science Technical University of Berlin, Berlin, 10623, Germany
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Abstract

We present a resonant Raman study of the tangential G-band in metallic SWNTs. By measuring the Raman spectra for isolated SWNTs, we show that the two different lineshapes observed for semiconducting and metallic SWNTs in bundles also occur for isolated SWNTs. A lineshape analysis of the tangential G-band feature for metallic SWNT bundles is presented, showing that only two components are present, the higher frequency component having a Lorentzian lineshape, and the lower one having a Breit–Wigner–Fano (BWF) line-shape. Through comparisons of the Raman tangential G-band spectra from three different diameter distributions of carbon nanotubes, we find that both the frequency and linewidth of the BWF component are diameter dependent.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 633: Symposium A – Nanotubes and Related Materials , 2000 , A14.10
Copyright
Copyright © Materials Research Society 2001

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References

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