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Interlayer tunnel and thermal activation in c-axis transport in Bi2Sr2CaCu2O8+δ

✍ Scribed by M. Giura; R. Fastampa; S. Sarti; N. Pompeo; E. Silva

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
132 KB
Volume
460-462
Category
Article
ISSN
0921-4534

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✦ Synopsis

We present a phenomenological model for the electrical transport in double-layered cuprates, based on the existence of two energy barriers along the c-axis. The model is applied to measurements of the dc resistivity in Bi 2 Sr 2 CaCu 2 O 8+d single crystals. We find that the model gives a comprehensive description of the out-of-plane normal resistivity q c at various doping d. Once the normal state has been determined, it is possible to obtain the fraction g(T, d) of the carriers that, below the pseudogap temperature T * , do not participate to the c-axis conductivity. We find that all the curves g(T, d) collapse onto a single universal curve g[T/T * (d)].

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