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Time Reversal Symmetry Breaking in noncentrosymmetric superconductor Re6Ti

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arxiv 1801.02841 v1 pith:ZKOIWGXX submitted 2018-01-09 cond-mat.supr-con

Time Reversal Symmetry Breaking in noncentrosymmetric superconductor Re6Ti

D. Singh , K. P. Sajilesh , J. A. T. Barker , D. McK. Paul , A. D. Hillier , R. P. Singh This is my paper
classification cond-mat.supr-con
keywords symmetrybreakingfamilycompoundsfurthermuonnoncentrosymmetricre6ti
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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