Author/Authors :
Saint-Paul، نويسنده , , M. and Guttin، نويسنده , , C. and Abbassi، نويسنده , , A. and Wang، نويسنده , , Zhao-Sheng and Luo، نويسنده , , Huiqian and Lu، نويسنده , , Xingye and Ren، نويسنده , , Cong and Wen، نويسنده , , Hai-Hu and Hasselbach، نويسنده , , K.، نويسنده ,
Abstract :
Measurements of the real σ1 and imaginary σ2 part of the conductivity were performed in optimally doped BaFe1.9Ni0.1As2 and overdoped BaFe1.88Ni0.12As2 crystals in the frequency range 20 MHz–1.5 GHz using a single coil technique. The temperature dependence of the London penetration depth follows a T2 law. The conductivity σ1 increases with decreasing temperature below Tc in agreement with the results obtained for the optimally Co doped BaFe2−xCoxAs2 crystals. The increase of σ1 in the superconducting state is attributed to a rapidly decrease of the quasiparticle scattering rate.
