Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2002-05-30
Physics
Condensed Matter
Strongly Correlated Electrons
6 pages, 4 figures
Scientific paper
The massive-band effects on screening behavior of metallic carbon nanotubes are theoretically investigated using two different methods; continuous and lattice quantum theories. Both approaches show screening of a localized external perturbation with an effective screening length of the order of the nanotube diameter. Calculating the nonlinear deformation of the local density of states near the charged perturbation, we show that the perturbative effects of the massive bands are effectively canceled by direct massive band interactions, such that a good agreement between the two methods can be achieved. The effective screening is important in nanoscale integration of nanotube-based electronic devices.
Farajian Amir A.
Kawazoe Yoshiyuki
Mizuseki Hiroshi
Sasaki Kaori
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