Charge screening of single-walled carbon nanotubes in a uniform transverse electric field

S. C. Chen, W. C. Hseih, M. F. Lin

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The sp3 tight-binding model is used to calculate electronic structures of single-walled carbon nanotubes. The static dielectric function is evaluated from the random-phase approximation. strongly depends on the momentum (q) and angular momentum (L) transfer in the e e interactions. of L=1 at long wavelength limit represents the screening ability in the presence of a uniform transverse electric field. (q=0,L=1) mainly comes from the pπ electrons, but not the sp2σ electrons. The external field is greatly reduced. The dependence of (q=0,L=1) on the chiral angle, the nanotube radius, the magnetic flux, and the temperature is not strong. The transverse dielectric screening is largely enhanced by the increasing free carriers in conduction bands.

Original languageEnglish
Article number193412
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number19
DOIs
Publication statusPublished - 2005 Nov 15

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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