Time-Reversal Symmetry Breaking Superconductivity in Sr2RuO4
G.M.Luke, Y.Fudamoto, K.M.Kojima, M.I.Larkin, J.Merrin, B.Nachumi,, Y.J.Uemura, Y.Maeno, Z.Q.Mao, Y.Mori, H.Nakamura, M.Sigrist
TL;DR
This paper presents muon spin relaxation measurements on Sr2RuO4, showing spontaneous internal magnetic fields below the transition temperature, indicating time-reversal symmetry breaking and suggesting p-wave superconductivity similar to superfluid 3He.
Contribution
It provides experimental evidence of time-reversal symmetry breaking in Sr2RuO4, supporting the p-wave pairing hypothesis in this superconductor.
Findings
Spontaneous internal magnetic fields appear below Tc
Time-reversal symmetry is broken in the superconducting state
Supports p-wave (odd-parity) pairing in Sr2RuO4
Abstract
We report muon spin relaxation measurements on the superconductor Sr2RuO4 that reveal the spontaneous appearance of an internal magnetic field below the transition temperature: the appearance of such a field indicates that the superconducting state in this material is characterized by the breaking of time-reversal symmetry. These results, combined with other symmetry considerations, suggest that superconductivity in Sr2RuO4 is of p-wave (odd-parity) type, analogous to superfluid 3He.
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