Nonuniversality of the dispersion interaction: analytic benchmarks for van der Waals energy functionals

Details Nonuniversality of the dispersion interaction: analytic benchmarks for van der Waals energy functionals Nonuniversality of the dispersion interaction: analytic benchmarks for van der Waals energy functionals

2005-02-17

arxiv.org/abs/cond-mat/0502422v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 0 figs

Scientific paper

We highlight the non-universality of the asymptotic behavior of dispersion forces, such that a sum of inverse sixth power contributions is often inadequate. We analytically evaluate the cross-correlation energy Ec between two pi-conjugated layers separated by a large distance D within the electromagnetically non-retarded Random Phase Approximation, via a tight-binding model. For two perfect semimetallic graphene sheets at T=0K we find Ec = C D^{-3}, in contrast to the "insulating" D^{-4} dependence predicted by currently accepted approximations. We also treat the case where one graphene layer is replaced by a thin metal, a model relevant to the exfoliation of graphite. Our general considerations also apply to nanotubes, nanowires and layered metals.

Affiliated with

Also associated with

No associations

Rating

Nonuniversality of the dispersion interaction: analytic benchmarks for van der Waals energy functionals 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 Nonuniversality of the dispersion interaction: analytic benchmarks for van der Waals energy functionals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nonuniversality of the dispersion interaction: analytic benchmarks for van der Waals energy functionals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-97220