Comment on “Crossover exponents in percolating superconductor–nonlinear-conductor mixtures”
Lei Gao, Wen-Gang Lu, Zhen-Ya Li
DOI 10.1103/PhysRevB.59.668 · Physical Review B
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Abstract
The purpose of this comment is to point out that results appearing in a paper by Zhang [Phys. Rev. B 53, 20 (1996)] on the crossover exponents in superconductor–nonlinear-normal-conductor composites are incorrect and to clarify the relation between the correlation length ξ and the size L of the system.
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