Abstract
The application of the Scher and Zallen criterion to continuum systems, made of metallic particles of radius and insulating particles of radius , is examined in view of the many cases of its misuse. It is argued that in the ≪ limit an excluded-volume determination of the percolation threshold should be used. For the ≊ case the Scher and Zallen critical fractional volume is maintained in the continuum only when the particles are spherical and of equal size. In the more common case of ≫, a hard-core soft-skin particle model provides the best available description of the system.
- Received 17 October 1986
DOI:https://doi.org/10.1103/PhysRevB.35.8749
©1987 American Physical Society