Extended Data Fig. 4: Control measurement.
From: Split superconducting and time-reversal symmetry-breaking transitions in Sr2RuO4 under stress
a, Photograph of the ‘sample’ for these measurements: a hematite mask is put in place of Sr2RuO4. Therefore the signal originates from muons stopping in hematite and in the non-magnetic background (cryostat walls, sample holder frame, and etc.). b, Strongly damped oscillations of the muon spin polarisation can be seen in the first 50 ns. There is no notable change in their form between 1.6 and 0.4 K. c, Weak transverse-field measurements, showing the signal from muons that did not implant into the hematite. d, Zero-field measurements: the polarisation of the muons implanting outside the hematite decays on a μs time scale. Fits exclude the first 50 ns, shown in panel (b). e, The zero-field muon spin relaxation rate has no significant temperature dependence.
