Nematicity as a Probe of Superconducting Pairing in Iron-Based Superconductors
Nematicity as a Probe of Superconducting Pairing in Iron-Based Superconductors
In several families of iron-based superconducting materials, a d-wave pairing instability may compete with the leading s-wave instability. Here we show that when both states have comparable free energies, superconducting and nematic degrees of freedom are strongly coupled. While nematic order causes a sharp non-analytic increase in $T_{c}$, nematic fluctuations …