Time Reversal Symmetry Breaking in noncentrosymmetric superconductor Re6Ti
Time Reversal Symmetry Breaking in noncentrosymmetric superconductor Re6Ti
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DOI：
10.1103/physrevb.97.100505
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发表时间：
2018-01
影响因子：
3.7
通讯作者：
D. Singh;K. P. Sajilesh;J. Barker;D. Paul;A. Hillier;R. P. Singh
中科院分区：
文献类型：
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作者：
D. Singh;K. P. Sajilesh;J. Barker;D. Paul;A. Hillier;R. P. Singh
用μ自旋旋转/弛豫（muSR）技术研究了非中心对称超导体Re_6Ti（Tc = 6.0K）的超导态.零场μ子实验表明超导态中存在自发磁场，表明时间反演对称性破缺（TRSB）。然而，低温横场μ子测量表明无节点s波超导性。时间反演对称性破缺进一步证实了在化学计量组成的Re24Ti5。这些结果表明，自旋-轨道耦合对Re6X族化合物的对称性没有影响。总之，这些研究表明，超导电性的非常规性质（TRSB）是Re6X系列化合物所固有的，并为进一步研究这一系列材料铺平了道路。
We have investigated the superconducting state of the noncentrosymmetric superconductor Re6Ti (Tc = 6.0 K) using muon-spin rotation/relaxation (muSR) technique. The zero-field muon experiment shows the presence of spontaneous magnetic fields in the superconducting state, indicating time-reversal symmetry breaking (TRSB). However, the low-temperature transverse field muon measurements suggest nodeless s-wave superconductivity. The time reversal symmetry breaking further confirmed in the stoichiometric composition Re24Ti5. These results indicate that the pairing symmetry is not affected by spin-orbital coupling Re6X family of compounds. Altogether these studies suggest unconventional nature (TRSB) of superconductivity is intrinsic to Re6X family of compounds and paves the way for further studies of this family of materials.