Xiao H, Gao B, Ma Y H, Li X J, Mu G, Hu T
Center for High Pressure Science and Technology Advanced Research, Beijing, 100094, People's Republic of China.
J Phys Condens Matter. 2016 Nov 16;28(45):455701. doi: 10.1088/0953-8984/28/45/455701. Epub 2016 Sep 13.
Out-of-plane angular dependent torque measurements were performed on CaFe0.88Co0.12AsF single crystals. Superconducting fluctuations, featured by magnetic field enhanced and exponential temperature dependent diamagnetism, are observed above the superconducting transition temperature T c, which is similar to that of cuprate superconductors, but less pronounced. In addition, the ratio of T c versus superfluid density follows well the Uemura line of high-T c cuprates, which suggests the exotic nature of the superconductivity in CaFe0.88Co0.12AsF.
对CaFe0.88Co0.12AsF单晶进行了面外角度相关扭矩测量。在高于超导转变温度Tc时观察到超导涨落，其特征是磁场增强和与温度呈指数关系的抗磁性，这与铜酸盐超导体类似，但不太明显。此外，Tc与超流密度的比值很好地遵循了高温铜酸盐的Uemura线，这表明CaFe0.88Co0.12AsF中超导性的奇异性质。
