Fermi-Energy-Dependent Structural Deformation of Chiral Single-Wall Carbon Nanotubes
Name
PhysRevApplied.2.014006.pdf
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Author(s)
Vieira, Bruno G. M.
Barros, Eduardo B.
Vercosa, Daniel G.
Samsonidze, Georgy
Souza Filho, Antonio
Dresselhaus, Mildred
Date Issued
July 2014
Journal
Physical Review Applied
Publisher
American Physical Society
Citation
Vieira, Bruno G. M., Eduardo B. Barros, Daniel G. Vercosa, Georgy Samsonidze, Antonio G. Souza Filho, and Mildred S. Dresselhaus. Fermi-Energy-Dependent Structural Deformation of Chiral Single-Wall Carbon Nanotubes. Phys. Rev. Applied 2, 014006 (2014). © 2014 American Physical Society
Version
Final published version
Abstract
In this work, we use an extended tight-binding approach for calculating the Fermi-energy dependence of the structural deformation of chiral single-wall carbon nanotubes (SWNTs). We show that, in general, nanotube strains occur in such a way as to avoid a net charge from being accumulated on the nanotube. We also investigate the effect of the Fermi-energy-induced strains on the electronic structure of SWNTs, showing that the optical transition energies change by up to 0.5 eV due to the induced strains and that this change is nearly independent of how the nanotube is deformed. Finally, we also consider the contribution of the electron-electron Coulomb repulsion to the total energy by using an effective regularized potential energy model. We show that the inclusion of the Coulomb repulsion leads to larger strains and smaller net charges transferred to the nanotube.
MIT Department
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Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevApplied.2.014006
