Time-reversal symmetry breaking in the noncentrosymmetric superconductor Re6Hf: Further evidence for unconventional behavior in the α-Mn family of materials

The discovery of new families of unconventional superconductors is important both experimentally and theoretically, especially if it challenges current models and thinking. By using muon spin relaxation in zero field, time-reversal symmetry breaking has been observed in Re6Hf. Moreover, the temperat...

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Bibliographic Details
Published in:Physical review. B 2017-11, Vol.96 (18)
Main Authors: Singh, D, Barker, J A T, Thamizhavel, A, Paul, D McK, Hillier, A D, Singh, R P
Format: Article
Language:English
Subjects:
Broken symmetry
Fluids
Muon spin relaxation
Superconductivity
Superfluidity
Temperature dependence
Unconventional superconductors
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Summary:The discovery of new families of unconventional superconductors is important both experimentally and theoretically, especially if it challenges current models and thinking. By using muon spin relaxation in zero field, time-reversal symmetry breaking has been observed in Re6Hf. Moreover, the temperature dependence of the superfluid density exhibits s-wave superconductivity with an enhanced electron-phonon coupling. This, coupled with the results from isostructural Re6Zr, shows that the Re6X family is indeed a new and important group of unconventional superconductors.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.96.180501