Subdominant $d$-wave interaction in superconducting CaKFe${}_4$As${}_2$?

Daniel Jost, Jan-Robin Scholz, Ulrike Zweck +5

We report inelastic light scattering results on the stoichiometric and fully ordered superconductor CaKFe${}_4$As${}_2$ as a function of temperature and light polarization. In the ener…