Time Reversal Symmetry Breaking in noncentrosymmetric superconductor Re6Ti

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 sym...

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Bibliographic Details
Published in:arXiv.org 2018-01
Main Authors: Singh, D, Sajilesh, K P, Barker, J A T, Paul, D McK, Hillier, A D, Singh, R P
Format: Article
Language:English
Subjects:
Broken symmetry
Coupling (molecular)
Muon spin relaxation
Muon spin rotation
Muons
Superconductivity
Symmetry
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1801.02841