CONDUCTIVITY AND DIELECTRIC-CONSTANT IN A WEDGE-SHAPED PT-FILM PERCOLATION SYSTEM

Authors
YE GX XU YQ GE HL JIAO ZK ZHANG QR
Citation
Gx. Ye et al., CONDUCTIVITY AND DIELECTRIC-CONSTANT IN A WEDGE-SHAPED PT-FILM PERCOLATION SYSTEM, Physics letters. A, 198(3), 1995, pp. 251-255
Citations number
12
Categorie Soggetti
Physics
Journal title
Physics letters. A → ACNP
ISSN journal
03759601
Volume
198
Issue
3
Year of publication
1995
Pages
251 - 255
Database
ISI
SICI code
0375-9601(1995)198:3<251:CADIAW>2.0.ZU;2-P
Abstract
A wedge-shaped Pt-film percolation system was prepared by the magnetro n sputtering method. A new nonlinear I-V behavior was found and can be well explained by the location-dependent hopping effect. Power-law be havior, sigma (omega) alpha omega(x) and epsilon (omega) alpha omega(- y), is observed near the percolation threshold. The exponents x and y are found to be 0.87 +/- 0.04 and 0.08 +/- 0.03, respectively, in agre ement with the general scaling relation x + y = 1.