Superconductivity in Sm-doped CaFe<sub>2</sub>As<sub>2</sub> single crystals

Superconductivity in Sm-doped CaFe₂As₂ single crystals

Chen Dong-Yun¹, Ruan Bin-Bin¹, Yu Jia¹, Guo Qi¹, Wang Xiao-Chuan¹, Mu Qing-Ge¹, Pan Bo-Jin¹, Liu Tong¹, Chen Gen-Fu^{1, 2}, Ren Zhi-An^{1, 2, †,}

The temperature dependence of normalized in-plane resistivity for Ca_{1 − x}Sm_xFe₂As₂ single crystals of (a) lower doping samples (x = 0.00, 0.01, 0.02, 0.03) and (b) higher doping samples (x = 0.05, 0.10, 0.15, 0.20). The insets show the expanded resistive curves around the collapsed phase transition and the superconducting transition respectively.