A New Quasi-One-Dimensional Ternary Molybdenum Pnictide Rb2MoaAs3 with Superconducting Transition at

• 作 者: Kang Zhao Qing-Ge Mu Bin-Bin Ruan Meng-Hu Zhou Qing-Song Yang Tong Liu Bo-Jin Pan Shuai Zhang Gen-Fu Chen Zhi-An Ren
• 机 构: Institute of Physics and Beijing National Laboratory for Condensed Matter Physics,Chinese Academy of
• 出 处: 中国物理快报（英文版）
• 发表日期: 2020年9期

We report superconductivity in a new ternary molybdenum pnictide Rb2Mo3As3,synthesized via the solid state reaction method.Powder x-ray diffraction analysis reveals a hexagonal crystal structure with space group P(6)m2(No.187),and the refined lattice parameters are a =10.431(5)(A),c =4.460(4)(A).SEM images show rod-like grains with good ductility,confirming a quasi-one-dimensional (Q1D) structure.Electrical resistivity and dc magnetic susceptibility characterizations exhibit superconductivity with an onset of Tc =10.5 K.The upper critical field of Rb2Mo3As3 is estimated to be 28.2 T at zero temperature,providing an evidence of possible unconventional superconductivity.Our recent discovery of MoAs-based superconductors above 10 K provides a unique platform for the study of exotic superconductivity in 4d electron systems with Q1D crystal structures.