Bulletin of the American Physical Society
APS March Meeting 2010
Volume 55, Number 2
Monday–Friday, March 15–19, 2010; Portland, Oregon
Session K1: Poster Session II (2:00 pm - 5:00 pm)
Tuesday, March 16, 2010
Room: Exhibit CD
Abstract ID: BAPS.2010.MAR.K1.203
Abstract: K1.00203 : Coulomb Effects in DNA-functionalized Single-Walled Carbon Nanotubes
Preview Abstract Abstract
We study how many-body effects (Coulomb effects) affect the optical and electronic properties of DNA-functionalized SWCNTs. Coulomb effects are very strong in one-dimensional systems and hence play a greater role in their optical and electronic properties. Coulomb interactions contribute to the optical and electronic properties of carbon nanotubes in two main ways: band gap renormalization which comes from electron-electron interaction and the formation of excitons due to electron-hole coupling. The procudure for obtaining the optical exitation energies for DNA-SWCNTs involves incorporating Coulomb interaction within the Bethe-Salpeter (BS) equation combined with the tight-binding approximation (with self-energy contributions restricted to the screened Hartree-Fock approximation). The DNA-SWCNT interaction is modelled by applying a perturbation operator of the Coulomb interaction which breaks both translational and rotational symmetry. This lowering of symmetry induced by DNA-wrapping changes the band gap of the nanotube thus modulating its electronic and optical properties. The role of these effects are elucidated.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.MAR.K1.203
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