| Broken Time-Reversal Symmetry in Superconducting Partially Filled Skutterudite Pr_(1-δ)Pt_4Ge_(12) |
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| 引用本文： | 臧佳伟,张建,朱子浩,丁兆峰,Kevin Huang,彭小冉,Adrian D.Hillier,殳蕾.Broken Time-Reversal Symmetry in Superconducting Partially Filled Skutterudite Pr_(1-δ)Pt_4Ge_(12)[J].中国物理快报,2019(10). |
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| 作者姓名： | 臧佳伟 张建 朱子浩 丁兆峰 Kevin Huang 彭小冉 Adrian D.Hillier 殳蕾 |
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| 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 Pr_(1-δ)Pt_4Ge_(12).The results from x-ray diffraction and magnetization measurements show that thePt_4 Ge_(12)]cage-forming structure survives and bulk superconductivity is preserved below the superconducting transition temperature T_c = 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 PrPt_4Ge_(12).
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