摘要
Unconventional superconductivity,in particular,in noncentrosymmetric systems,has been a long-sought topic in condensed matter physics.Recently,Re-based superconductors have attracted great attention owing to the potential time-reversal symmetry breaking in their superconducting states.We report the superconducting properties of noncentrosymmetric compounds Ta_(x)Re_(1-x) with 0.1 ≤x≤0.25,and find that the superconducting transition temperature reaches a maximum of ~8 K at the optimal level x=0.15.Nevertheless,muon-spin rotation and relaxation measurements reveal no time-reversal symmetry breaking existing in its superconducting state,which is in sharp contrast to both centrosymmetric Re metal and many other noncentrosymmetric Re-based superconductors.
作者
Chun-Qiang Xu
Yi Liu
Wei Zhou
Jia-Jia Feng
Sen-Wei Liu
Yu-Xing Zhou
Hao-Bo Wang
Zhi-Da Han
Bin Qian
Xue-Fan Jiang
Xiao-Feng Xu
Wei Ye
Zhi-Xiang Shi
Xiang-Lin Ke
Pabitra-Kumar Biswas
徐春强;刘艺;周苇;冯嘉嘉;刘森巍;周宇星;汪浩波;韩志达;钱斌;江学范;许晓峰;叶巍;施智祥;柯祥林;Pabitra-Kumar Biswas(School of Physics and Key Laboratory of MEMS of the Ministry of Education,Southeast University,Nanjing 211189,China;Department of Applied Physics,Zhejiang University of Technology,Hangzhou 310023,China;School of Electronic and Information Engineering,Changshu Institute of Technology,Changshu 215500,China;Department of Physics,Zhejiang University,Hangzhou 310007,China;Department of Physics and Astronomy,Michigan State University,East Lansing,Michigan 48824-2320,USA;ISIS Pulsed Neutron and Muon Source,STFC Rutherford Appleton Laboratory,Harwell Campus,Didcot,Oxfordshire OX110QX,United Kingdom)
基金
Supported by the National Key R&D Program of China(Grant No.2018YFA0704300)
the National Natural Science Foundation of China(Grant Nos.U1732162,11974061,11704047,U1832147 and 11674054)
the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(Grant No.XDB25000000)。
