Transport evidence for decoupled nematic and magnetic criticality in iron chalcogenides

The role nematicity and magnetic fluctuations play in the manifestation of unconventional superconductivity for Fe-based superconductors is actively debated with, so far, no clear consensus. Here, the authors study the resistive properties of sulfur-doped FeSe under applied pressure finding evidence of two distinct contributions to the electrical resistivity, which suggest a decoupling of nematic and magnetic fluctuations in this system.