摘要
Time reversal symmetry(TRS)is a key symmetry for classification of unconventional superconductors,and the violation of TRS often results in a wealth of novel properties.Here we report the synthesis and superconducting properties of the partially filled skutterudite Pr1-δPt4Ge12.The results from x-ray diffraction and magnetization measurements show that the[Pt4 Ge12]cage-forming structure survives and bulk superconductivity is preserved below the superconducting transition temperature Tc = 7.80 K.The temperature dependence of both the upper critical field and the electronic specific heat can be described in terms of a two-gap model,providing strong evidence of multi-band superconductivity.TRS breaking is observed using zero Held muon-spin relaxation experiments,and the magnitude of the spontaneous field is nearly half of that in PrPt4Ge12.
Time reversal symmetry（TRS）is a key symmetry for classification of unconventional superconductors,and the violation of TRS often results in a wealth of novel properties.Here we report the synthesis and superconducting properties of the partially filled skutterudite Pr1-δPt4Ge12.The results from x-ray diffraction and magnetization measurements show that the[Pt4 Ge12]cage-forming structure survives and bulk superconductivity is preserved below the superconducting transition temperature Tc = 7.80 K.The temperature dependence of both the upper critical field and the electronic specific heat can be described in terms of a two-gap model,providing strong evidence of multi-band superconductivity.TRS breaking is observed using zero Held muon-spin relaxation experiments,and the magnitude of the spontaneous field is nearly half of that in PrPt4Ge12.
作者
Jia-Wei Zang
Jian Zhang
Zi-Hao Zhu
Zhao-Feng Ding
Kevin Huang
Xiao-Ran Peng
Adrian DHillier
Lei Shu
臧佳伟;张建;朱子浩;丁兆峰;Kevin Huang;彭小冉;Adrian D.Hillier;殳蕾(State Key Laboratory of Surface Physics,Department of Physics,Fudan University,Shanghai 200433;Geballe Laboratory for Advanced Materials,Stanford University,Stanford,CA 94305,USA;ISIS Facility,STFC Rutherford Appleton Laboratory,Harwell Science and Innovation Campus,Chilton,Didcot,Oxon OX110QX,United Kingdom;Collaborative Innovation Center of Advanced Microstructures,Nanjing 210093)
基金
Supported by the National Key Research and Development Program of China under Grant Nos 2017YFA0303104 and2016YFA0300503
the National Natural Science Foundation of China under Grant No 11774061
the Chinese Government Scholarship of China Scholarship Council
