Physics – Condensed Matter – Materials Science
Scientific paper
2008-09-04
Physics
Condensed Matter
Materials Science
Scientific paper
10.1103/PhysRevB.79.113402
Layered and nanotubular systems that are metallic or graphitic are known to exhibit unusual dispersive van der Waals (vdW) power laws under some circumstances. In this letter we investigate the vdW power laws of bulk and finite layered systems and their interactions with other layered systems and atoms in the electromagnetically non-retarded case. The investigation reveals substantial difference between `cleavage' and `exfoliation' of graphite and metals where cleavage obeys a $C_2 D^{-2}$ vdW power law while exfoliation obeys a $C_3 \log(D/D_0) D^{-3}$ law for graphitics and a $C_{5/2} D^{-5/2}$ law for layered metals. This leads to questions of relevance in the interpretation of experimental results for these systems which have previously assumed more trival differences. Furthermore we gather further insight into the effect of scale on the vdW power laws of systems that simultaneously exhibit macroscopic and nanoscopic dimensions. We show that, for metallic and graphitic layered systems, the known "unusual" power laws can be reduced to standard or near standard power laws when the effective scale of one or more dimension is changed. This allows better identification of the systems for which the commonly employed `sum of $C_6 D^{-6}$' type vdW methods might be valid such as layered bulk to layered bulk and layered bulk to atom.
Dobson John F.
Gould Tim
Gray Evan
No associations
LandOfFree
van der Waals dispersion power laws for cleavage, exfoliation and stretching in multi-scale, layered systems 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 dispersion power laws for cleavage, exfoliation and stretching in multi-scale, layered systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and van der Waals dispersion power laws for cleavage, exfoliation and stretching in multi-scale, layered systems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-141407