NMR study under pressure on the iron-based superconductor FeSe1−xSx (x = 0.12 and 0.23): Relationship between nematicity and AF fluctuations

We performed 77Se-nuclear magnetic resonance measurements on FeSe1−xSx (x = 0.12 and 0.23). We found from the relaxation time T1 that nematicity and antiferromagnetic fluctuations show cooperative ...