Physics – Condensed Matter – Superconductivity
Scientific paper
2011-08-03
Physics
Condensed Matter
Superconductivity
9 pages, 6 figures
Scientific paper
To investigate the transport properties of iron based superconductors, we prepared planar hybrid superconductor-normal metal-superconductor (SNS') thin film junctions with BaFe1.8Co0.2As2 as base electrode. As counter electrode we used a lead indium alloy, while the normal metal layer was formed by thin gold films. Temperature dependent measurements of the electrical conductivity were strongly influenced by the properties of the electrodes. We developed a junction structure that allows us to characterize the electrodes, too, including the behavior of their normal state resistance in order to correct their influences on the conduction spectra. The corrected conductivity of the junction was described within an extended BTK-model and shows a behavior dominated by Andreev reflexion.
Döring Sven
Haindl Silvia
Holzapfel Bernhard
Iida Kei
Kurth Fritz
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