Diameter Dependence of the Dielectric Constant for the Excitonic Transition Energy of Single-Wall Carbon Nanotubes
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Araujo-2009-Diameter Dependence.pdf
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Author(s)
Dresselhaus, Mildred
Jorio, A.
Saito, R.
Sato, K.
Araujo, Paulo Antonio Trinidade
Date Issued
September 2009
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Araujo, P. T. et al. “Diameter Dependence of the Dielectric Constant for the Excitonic Transition Energy of Single-Wall Carbon Nanotubes.” Physical Review Letters 103.14 (2009): 146802. © 2009 The American Physical Society.
Version
Final published version
Abstract
The measured optical transition energies Eii of single-wall carbon nanotubes are compared with bright exciton energy calculations. The Eii differences between experiment and theory are minimized by considering a diameter-dependent dielectric constant κ, which comprises the screening from the tube and from the environment. Different κ dependencies are obtained for (E[subscript 11]S, E[subscript 22]S, E[subscript 11]M) relative to (E[subscript 33]S, E[subscript 44]S). A changing environment changes the κ diameter dependence for (E[subscript 11]S, E[subscript 22]S, E[subscript 11]M), but for (E[subscript 33]S, E[subscript 44]S) the environmental effects are minimal. The resulting calculated exciton energies reproduce experimental Eii values within ±70 meV for a diameter range (0.7
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.103.146802
