Competing contributions of superconducting and insulating states in Ag5Pb2O6/CuO composite

Details Competing contributions of superconducting and insulating states in Ag5Pb2O6/CuO composite Competing contributions of superconducting and insulating states in Ag5Pb2O6/CuO composite

2010-01-19

arxiv.org/abs/1001.3185v1

Physics

Condensed Matter

Superconductivity

9 pages, 4 figures

Scientific paper

The composite material, consisting of metallic particles Ag5Pb2O6 diluted in insulating CuO matrix, has been investigated in a narrow concentration range separating ballistic tunnel transport from hopping conductivity. The formation of intergrain conducting bridges between metallic particles has been avoided by a careful metallurgic treatment. Resistivity is indicated by temperature dependence lnR~(T0/T)^1/2, and this dependence appeals an attention for possible one dimensional conductivity which could be looked upon as a property uniquely associated with an onset of the superconductivity extending up to Tc ~ 356 K.

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