In this work, an experimental approach toward reaching new insights into the mechanism of superconductivity in the iron-based compounds is presented. The temperature dependence of the penetration depth and of the microwave conductivity of high-quality Ba(Fe1-xCox)2As2 and (Ba1-xKx)Fe2As2 single crystals have been obtained by a 7.97-GHz superconducting coplanar resonator technique, in a perturbative approach. The proposed technique is suitable to obtain the absolute value of the penetration depth and shows high sensitivity to small samples. For the Co-doped BaFe2As2, the comparison of crystals with different shape factors allows distinguishing the in-plane and out-of-plane components of the penetration depth. Peaks in the normalized quasiparticle conductivity of both Co-doped and K-doped crystals are shown and discussed.
|Titolo:||Penetration Depth and Quasiparticle Conductivity of Co- and K-Doped BaFe2As2 Crystals, Investigated by a Microwave Coplanar Resonator Technique|
|Data di pubblicazione:||2016|
|Digital Object Identifier (DOI):||10.1109/TASC.2016.2529419|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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