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Effects of strain on the resonant Raman profile of metallic

Published online by Cambridge University Press:  26 February 2011

Antonio G Souza Filho ,
N Kobayashi ,
Jie Jiang ,
Riichiro Saito ,
Stephen B Cronin ,
Josue Mendes Filho ,
Ge G Samsonidze ,
Gene Dresselhaus  and
Mildred S Dresselhaus
Antonio G Souza Filho
Affiliation:
agsf@fisica.ufc.br, Universidade Federal do Ceara, Fisica, Campus do Pici, Caixa Postal 6030, Fortaleza, Ceara, 60455-900, Brazil, +55 85 4008 9912, +55 85 4008 9450
N Kobayashi
Affiliation:
Kobayashi@flex.phys.tohoku.ac.jp, Tohoku University, Physics, Japan
Jie Jiang
Affiliation:
jiang@flex.phys.tohoku.ac.jp, Tohoku University, Physics, Japan
Riichiro Saito
Affiliation:
saito@flex.phys.tohoku.ac.jp, Tohoku University, Physics, Japan
Stephen B Cronin
Affiliation:
scronin@usc.edu, University Southern California, Physics, United States
Josue Mendes Filho
Affiliation:
josue@fisica.ufc.br, Universidade Federal do Ceara, Fisica, Brazil
Ge G Samsonidze
Affiliation:
gsm@mgm.mit.edu, MIT, Electrical Engineering and Computer Science, United States
Gene Dresselhaus
Affiliation:
gene@mgm.mit.edu, MIT, Francis Bitter Magnet Laboratory, United States
Mildred S Dresselhaus
Affiliation:
millie@mgm.mit.edu, MIT, Electrical Engineering and Computer Science and Physcs Department, United States
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Abstract

In this paper we report the effects of strain on the electronic properties of single wall carbon nanotubes and its consequence on the resonant Raman cross section. A quantum interference effect has been predicted for the radial breathing mode spectra for metallic tubes. For metallic tubes, the lower and upper components of Eii resulting from the trigonal warping effect are affected differently and for low chiral angle they cross for some strain value. Near (at) the crossing point, the resonant Raman spectra profile exhibits a maximum (minimum) value due to a quantum interference in the Raman cross section. This Raman cross section interference effect was observed in Raman experiments carried out on isolated SWNTs. The Raman experiment performed on an isolated strained metallic SWNT supports our modeling predictions.

Keywords

Raman spectroscopyoptical propertiesnanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 901: Symposium R – Assembly at the Nanoscale – Toward Functional Nanostructured Materials , 2005 , 0901-Rb24-04
Copyright
Copyright © Materials Research Society 2006

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