A New Quasi-One-Dimensional Ternary Molybdenum Pnictide Rb2Mo3As3 with Superconducting Transition at 10.5K. (September 2020)

• Record Type: Journal Article
• Authors: Zhao 赵, Kang 康; Mu 穆, Qing-Ge 青隔; Ruan 阮, Bin-Bin 彬彬; Zhou 周, Meng-Hu 孟虎; Yang 杨, Qing-Song 清松; Liu 刘, Tong 通; Pan 潘, Bo-Jin 伯津; Zhang 张, Shuai 帅; Chen 陈, Gen-Fu 根富; Ren 任, Zhi-An 治安
• Is Part Of: Chinese physics letters. Volume 37:Number 9(2020)
• Publication Date: 2020-09
• Subjects: 74.70.Dd -- 74.62.Bf -- 74.70.-b; Physics -- Periodicals; Electronic journals; 530.05
• DOI: 10.1088/0256-307X/37/9/097401
• Languages: English
• ISSNs: 0256-307X

Abstract

Abstract : We report superconductivity in a new ternary molybdenum pnictide Rb2 Mo3 As3, synthesized via the solid state reaction method. Powder x-ray diffraction analysis reveals a hexagonal crystal structure with space group P 6 ¯ m 2 (No. 187), and the refined lattice parameters are a = 10.431(5) Å, c = 4.460(4) Å. 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 T c = 10.5 K. The upper critical field of Rb2 Mo3 As3 is estimated to be 28.2T 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 4 d electron systems with Q1D crystal structures.