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

D. Singh; J. A. T. Barker; A. Thamizhavel; D. McK. Paul; A. D. Hillier; R. P. Singh

doi:10.1103/PhysRevB.96.180501

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

D. Singh, J. A. T. Barker, A. Thamizhavel, D. McK. Paul, A. D. Hillier, R. P. Singh

DOI 10.1103/PhysRevB.96.180501 · Physical Review B

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Abstract

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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Re6Hf Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	5.98	Pressure not reported	unknown
Re6Hf Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	5.91	Pressure not reported	midpoint
Re6Zr Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown