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Author Ziese, M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ HIGH-TC SUPERCONDUCTORS ♦ MAGNETIC FLUX ♦ MIXED STATE ♦ ELECTRIC CONDUCTIVITY ♦ SCALING LAWS ♦ FREQUENCY DEPENDENCE ♦ PHASE TRANSFORMATIONS ♦ MEAN-FIELD THEORY ♦ CRITICAL EXPONENTS
Abstract A model for percolative vortex motion in inhomogeneous superconductors is introduced. Near the percolation threshold the linear, frequency-dependent electronic conductivity is found to obey scaling laws. The percolation model for vortex motion provides an alternative explanation to the experimental finding of scaling in the electronic conductivity that is conventionally attributed to a vortex glass transition. The critical exponents derived from simulations of bond percolation on three-dimensional lattices are in satisfying agreement with critical exponents obtained from the scaling analysis of the conductivity of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} twinned single crystals and ceramics. The electronic conductivity is calculated in an effective medium approximation and is compared to experimental data. {copyright} {ital 1996 The American Physical Society.}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-05-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 53
Issue Number 18


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