Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2004-10-08
Phys. Rev. B 72, 035451 (2005)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
15 pages, 5 figures
Scientific paper
We have investigated atom-nanotube van der Waals (vdW) coupling in atomically doped carbon nanotubes (CNs). Our approach is based on the perturbation theory for degenerated atomic levels, thus accounting for both weak and strong atom-vacuum-field coupling. The vdW energy is described by an integral equation represented in terms of the local photonic density of states (DOS). By solving it numerically, we demonstrate the inapplicability of standard weak-coupling-based vdW interaction models in a close vicinity of the CN surface where the local photonic DOS effectively increases, giving rise to an atom-field coupling enhancement. An inside encapsulation of atoms into the CN has been shown to be energetically more favorable than their outside adsorption by the CN surface. If the atom is fixed outside the CN, the modulus of the vdW energy increases with the CN radius provided that the weak atom-field coupling regime is realized (i.e., far enough from the CN). For inside atomic position, the modulus of the vdW energy decreases with the CN radius, representing a general effect of the effective interaction area reduction with lowering the CN curvature.
Bondarev Igor V.
Lambin Ph
No associations
LandOfFree
van der Waals coupling in atomically doped carbon nanotubes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with van der Waals coupling in atomically doped carbon nanotubes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and van der Waals coupling in atomically doped carbon nanotubes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-315905